This number is a prime.

                                                                9 9971919197

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

+ The largest prime in a 11x11 prime-magical square discovered by Jurgen T.W.A. Baumann in 1999: each row, column and main diagonal are emirps. [Rivera]

Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell