3581
This number is a prime.
Just showing those entries submitted by 'Keith': (Click here to show all)
The smallest prime p for which all the decimal digits of
31p are either zeros or ones (31 * 3581 = 111011). The next
few primes of this type are 3583871, 32290681, 326132581,
... . [Keith]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Reginald McLean