97723...32801 (38-digits)

This number is a composite.

97723892 8486829239 9456773410 0095132801

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Call this number n. Then for each prime p which divides n, both p-1 and p+1 divide n-1. Hence n passes an infinite number of Lucas pseudoprimality tests, despite being divisible by 16 distinct primes. [Broadhurst]

Submitted: 2009-03-30 22:35:12; Last Modified: 2009-03-30 23:07:00.