101001001
This number is a prime.
The first occurrence of two consecutive primes (101001001, 101001011) such that both are anti-Yarborough primes, i.e., contains only 0's and 1's. [Gupta]
The smallest naughty prime that contains only 0's and 1's. [Wesolowski]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Reginald McLean