5232869
This number is a prime.
The second smallest prime p (the first one is 79) such that when multiplied with p-1 (5232868 * 5232869 = 27382912738292) the result is a near-tautonymic number, i.e., in this case a concatenation of two successive numbers 2738291 and 2738292 in ascending order. Note that the first halve 2738291 is prime as well. [De Geest]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell