72000
4102 + 72000 = 4902, 4102 - 72000 = 3102.
Page of Squares : First Upload November 3, 2012 ; Last Revised November 3, 2012by Yoshio Mimura, Kobe, Japan
72030
720302 = (12 + 6)(82 + 6)(272 + 6)(1202 + 6) = (222 + 6)(272 + 6)(1202 + 6).
Page of Squares : First Upload March 29, 2014 ; Last Revised March 29, 2014by Yoshio Mimura, Kobe, Japan
72051
720512± 2 are primes.
Page of Squares : First Upload March 29, 2014 ; Last Revised March 29, 2014by Yoshio Mimura, Kobe, Japan
72058
720582± 3 are primes.
Page of Squares : First Upload March 29, 2014 ; Last Revised March 29, 2014by Yoshio Mimura, Kobe, Japan
72062
720622± 3 are primes.
Page of Squares : First Upload March 29, 2014 ; Last Revised March 29, 2014by Yoshio Mimura, Kobe, Japan
72066
720662± 5 are primes.
Page of Squares : First Upload March 29, 2014 ; Last Revised March 29, 2014by Yoshio Mimura, Kobe, Japan
72072
720722 = (22 - 1)(32 - 1)(82 - 1)(122 - 1)(1552 - 1) = (22 - 1)(102 - 1)(122 - 1)(132 - 1)(272 - 1)
= (22 - 1)(102 - 1)(272 - 1)(1552 - 1) = (32 - 1)(82 - 1)(102 - 1)(122 - 1)(272 - 1)
= (52 - 1)(82 - 1)(122 - 1)(1552 - 1).
by Yoshio Mimura, Kobe, Japan
72080
720802 = (12 + 4)(22 + 4)(72 + 4)(262 + 4)(602 + 4) = (22 + 4)(62 + 4)(72 + 4)(92 + 4)(602 + 4)
= (22 + 4)(72 + 4)(82 + 4)(92 + 4)(462 + 4) = (22 + 4)(72 + 4)(462 + 4)(762 + 4)
= (22 + 4)(92 + 4)(462 + 4)(602 + 4) = (262 + 4)(462 + 4)(602 + 4)
= (62 + 4)(72 + 4)(262 + 4)(602 + 4) = (72 + 4)(82 + 4)(262 + 4)(462 + 4).
by Yoshio Mimura, Kobe, Japan
72090
720902 = (202 + 5)(232 + 5)(1552 + 5).
Page of Squares : First Upload March 29, 2014 ; Last Revised March 29, 2014by Yoshio Mimura, Kobe, Japan
72118
721182 = 456 x 457 + 458 x 459 + 460 x 461 + 462 x 463 + ... + 3150 x 3151.
Page of Squares : First Upload November 3, 2012 ; Last Revised November 3, 2012by Yoshio Mimura, Kobe, Japan
72126
721262± 5 are primes.
Page of Squares : First Upload March 29, 2014 ; Last Revised March 29, 2014by Yoshio Mimura, Kobe, Japan
72150
721502 = (22 + 9)(42 + 9)(112 + 9)(182 + 9)(192 + 9) = (22 + 9)(42 + 9)(112 + 9)(3512 + 9)
= (42 + 9)(182 + 9)(192 + 9)(412 + 9) = (42 + 9)(412 + 9)(3512 + 9).
by Yoshio Mimura, Kobe, Japan
72216
722162 = (42 + 8)(132 + 8)(11082 + 8).
Page of Squares : First Upload March 29, 2014 ; Last Revised March 29, 2014by Yoshio Mimura, Kobe, Japan
72230
722302± 3 are primes.
Page of Squares : First Upload March 29, 2014 ; Last Revised March 29, 2014by Yoshio Mimura, Kobe, Japan
72249
722492± 2 are primes.
Page of Squares : First Upload March 29, 2014 ; Last Revised March 29, 2014by Yoshio Mimura, Kobe, Japan
72285
722852 = 5225121225, a square with 3 kinds of digits.
Page of Squares : First Upload November 3, 2012 ; Last Revised November 3, 2012by Yoshio Mimura, Kobe, Japan
72303
723032± 2 are primes.
Page of Squares : First Upload March 29, 2014 ; Last Revised March 29, 2014by Yoshio Mimura, Kobe, Japan
72312
723122± 5 are primes.
Page of Squares : First Upload March 29, 2014 ; Last Revised March 29, 2014by Yoshio Mimura, Kobe, Japan
72324
723242 = (12 + 5)(32 + 5)(112 + 5)(7032 + 5).
Page of Squares : First Upload March 29, 2014 ; Last Revised March 29, 2014by Yoshio Mimura, Kobe, Japan
72335
723352 = 5232352225, a square with 3 kinds of digits.
Page of Squares : First Upload November 3, 2012 ; Last Revised November 3, 2012by Yoshio Mimura, Kobe, Japan
72351
723512± 2 are primes.
Page of Squares : First Upload March 29, 2014 ; Last Revised March 29, 2014by Yoshio Mimura, Kobe, Japan
72361
72361 = 2692, a square with different digits.
Page of Squares : First Upload November 3, 2012 ; Last Revised November 3, 2012by Yoshio Mimura, Kobe, Japan
72369
723692 = (32 + 2)(72 + 2)(272 + 2)(1132 + 2) = (32 + 8)(52 + 8)(112 + 8)(2692 + 8)
= (32 + 8)(712 + 8)(2472 + 8).
by Yoshio Mimura, Kobe, Japan
72384
4252 + 72384 = 5032, 4252 - 72384 = 3292.
Page of Squares : First Upload November 3, 2012 ; Last Revised November 3, 2012by Yoshio Mimura, Kobe, Japan
72398
723982± 3 are primes.
723982 = 4622 + 4632 + 4642 + ... + 25102.
Page of Squares : First Upload November 3, 2012 ; Last Revised March 29, 2014by Yoshio Mimura, Kobe, Japan
72414
724142± 5 are primes.
Page of Squares : First Upload March 29, 2014 ; Last Revised March 29, 2014by Yoshio Mimura, Kobe, Japan
72432
724322 = 2714 x 2715 + 2716 x 2717 + 2718 x 2719 + 2720 x 2721 + ... + 3718 x 3719.
Page of Squares : First Upload November 3, 2012 ; Last Revised November 3, 2012by Yoshio Mimura, Kobe, Japan
72475
724752 = 5252625625, a square with 3 kinds of digits.
Page of Squares : First Upload November 3, 2012 ; Last Revised November 3, 2012by Yoshio Mimura, Kobe, Japan
72495
724952 = 5255525025, a square with 3 kinds of digits.
Page of Squares : First Upload November 3, 2012 ; Last Revised November 3, 2012by Yoshio Mimura, Kobe, Japan
72498
724982± 5 are primes.
Page of Squares : First Upload March 29, 2014 ; Last Revised March 29, 2014by Yoshio Mimura, Kobe, Japan
72543
725432± 2 are primes.
Page of Squares : First Upload March 29, 2014 ; Last Revised March 29, 2014by Yoshio Mimura, Kobe, Japan
72576
3902 + 72576 = 4742, 3902 - 72576 = 2822.
725762 = (22 - 1)(32 - 1)(52 - 1)(72 - 1)(82 - 1)(552 - 1).
Page of Squares : First Upload November 3, 2012 ; Last Revised November 3, 2012by Yoshio Mimura, Kobe, Japan
72600
2752 + 72600 = 3852, 2752 - 72600 = 552.
Page of Squares : First Upload November 3, 2012 ; Last Revised November 3, 2012by Yoshio Mimura, Kobe, Japan
72608
726082± 3 are primes.
Page of Squares : First Upload March 29, 2014 ; Last Revised March 29, 2014by Yoshio Mimura, Kobe, Japan
72618
726182 = (12 + 3)(42 + 3)(62 + 3)(122 + 3)(1102 + 3) = (22 + 3)(32 + 3)(722 + 3)(1102 + 3)
= (22 + 3)(42 + 3)(62 + 3)(92 + 3)(1102 + 3) = (22 + 3)(42 + 3)(72 + 3)(122 + 3)(722 + 3)
= (22 + 3)(62 + 3)(612 + 3)(722 + 3) = (42 + 3)(62 + 3)(372 + 3)(722 + 3)
= (42 + 3)(122 + 3)(192 + 3)(722 + 3) = (92 + 3)(722 + 3)(1102 + 3).
by Yoshio Mimura, Kobe, Japan
72621
726212 = 5273809641, a square with different digits.
Page of Squares : First Upload November 3, 2012 ; Last Revised November 3, 2012by Yoshio Mimura, Kobe, Japan
72624
726242 = (22 + 8)(482 + 8)(4362 + 8).
Page of Squares : First Upload March 29, 2014 ; Last Revised March 29, 2014by Yoshio Mimura, Kobe, Japan
72626
726262± 3 are primes.
Page of Squares : First Upload March 29, 2014 ; Last Revised March 29, 2014by Yoshio Mimura, Kobe, Japan
72688
726882± 3 are primes.
Page of Squares : First Upload March 29, 2014 ; Last Revised March 29, 2014by Yoshio Mimura, Kobe, Japan
72693
726932± 2 are primes.
Page of Squares : First Upload March 29, 2014 ; Last Revised March 29, 2014by Yoshio Mimura, Kobe, Japan
72759
727592± 2 are primes.
Page of Squares : First Upload March 29, 2014 ; Last Revised March 29, 2014by Yoshio Mimura, Kobe, Japan
72772
727722± 3 are primes.
Page of Squares : First Upload March 29, 2014 ; Last Revised March 29, 2014by Yoshio Mimura, Kobe, Japan
72789
(727892 + 9) = (22 + 9)(82 + 9)(122 + 9)(132 + 9)(142 + 9).
Page of Squares : First Upload November 3, 2012 ; Last Revised November 3, 2012by Yoshio Mimura, Kobe, Japan
72790
727902± 3 are primes.
Page of Squares : First Upload March 29, 2014 ; Last Revised March 29, 2014by Yoshio Mimura, Kobe, Japan
72800
728002 = (62 - 1)(92 - 1)(272 - 1)(512 - 1).
Page of Squares : First Upload March 29, 2014 ; Last Revised March 29, 2014by Yoshio Mimura, Kobe, Japan
72832
728322 = (52 + 7)(128752 + 7).
Page of Squares : First Upload March 29, 2014 ; Last Revised March 29, 2014by Yoshio Mimura, Kobe, Japan
72860
728602± 3 are primes.
Page of Squares : First Upload March 29, 2014 ; Last Revised March 29, 2014by Yoshio Mimura, Kobe, Japan
72864
728642 = (72 - 1)(102 - 1)(10572 - 1).
Page of Squares : First Upload March 29, 2014 ; Last Revised March 29, 2014by Yoshio Mimura, Kobe, Japan
72891
728912± 2 are primes.
Page of Squares : First Upload March 29, 2014 ; Last Revised March 29, 2014by Yoshio Mimura, Kobe, Japan
72900
453 + 72900 = 4052, 453 - 72900 = 1352.
Page of Squares : First Upload November 3, 2012 ; Last Revised November 3, 2012by Yoshio Mimura, Kobe, Japan
72912
729122 = (12 + 3)(22 + 3)(32 + 3)(52 + 3)(92 + 3)(822 + 3)
= (12 + 3)(22 + 3)(92 + 3)(112 + 3)(1352 + 3) = (12 + 3)(52 + 3)(112 + 3)(122 + 3)(512 + 3)
= (12 + 3)(52 + 3)(512 + 3)(1352 + 3) = (22 + 3)(32 + 3)(52 + 3)(112 + 3)(1352 + 3)
= (22 + 3)(52 + 3)(92 + 3)(112 + 3)(512 + 3) = (32 + 3)(112 + 3)(372 + 3)(512 + 3)
= (52 + 3)(92 + 3)(112 + 3)(1352 + 3).
by Yoshio Mimura, Kobe, Japan
72913
729132 = (42 + 1)(176842 + 1).
Page of Squares : First Upload November 16, 2013 ; Last Revised November 16, 2013by Yoshio Mimura, Kobe, Japan
72928
729282 = (12 + 7)(32 + 7)(62 + 7)(9832 + 7) = (12 + 7)(62 + 7)(292 + 7)(1352 + 7)
= (62 + 7)(112 + 7)(9832 + 7).
by Yoshio Mimura, Kobe, Japan
72954
729542± 5 are primes.
Page of Squares : First Upload March 29, 2014 ; Last Revised March 29, 2014by Yoshio Mimura, Kobe, Japan
72974
729742± 3 are primes.
Page of Squares : First Upload March 29, 2014 ; Last Revised March 29, 2014by Yoshio Mimura, Kobe, Japan