56713...35243 (38-digits)

This number is a prime.

56713727 8201564105 7722910123 8628035243

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Wagstaff primes related to 'The New Mersenne Conjecture' are the indices of perfect numbers in a list of centered 9-gonal numbers; this one being the largest. [Homewood]

Submitted: 2018-03-30 18:36:47; Last Modified: 2018-04-22 13:09:46.