39999...62731 (118-digits)

This number is a prime.

                        39999889 9993489445 3222147356 5546713568 1172082607
7931520423 2452113850 0132476717 9248444034 5910986805 6739255739 1849262731

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

Sequence of primes growing from the center, two digits each time from 00 to 99, no repetitions allowed. This example starts with a prime seed of "31": 31, 3931, 399731, 39992731, etc. [Rivera]