11917...10401 (82-digits)

This number is a prime.

                                                               11 9178452550
1486285440 1513246908 9358746730 6703332577 7942050816 1038295754 3058510401

Just showing those entries submitted by 'Poo Sung': (Click here to show all)

1⁸¹ + 3⁷⁹ + 5⁷⁷ + 7⁷⁵ + 9⁷³ + 11⁷¹ + 13⁶⁹ + 15⁶⁷ + 17⁶⁵ + 19⁶³ + 21⁶¹ + 23⁵⁹ + 25⁵⁷ + 27⁵⁵ + 29⁵³ + 31⁵¹ + 33⁴⁹ + 35⁴⁷ + 37⁴⁵ + 39⁴³ + 41⁴¹ + 43³⁹ + 45³⁷ + 47³⁵ + 49³³ + 51³¹ + 53²⁹ + 55²⁷ + 57²⁵ + 59²³ + 61²¹ + 63¹⁹ + 65¹⁷ + 67¹⁵ + 69¹³ + 71¹¹ + 73⁹ + 75⁷ + 77⁵ + 79³ + 81¹ is the smallest prime of this type. [Poo Sung]