This number is a prime.

                                                            66666 6666666631

Just showing those entries submitted by 'Loungrides': (Click here to show all)

+ (666666666666631, 666666666666643) is the first occurrence of two successive primes, each containing a baker’s dozen of successive d’s, (d=6), and which differ by a dozen. [Loungrides]

Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell