This number is a prime.

                                                              105 0100100501

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

+ The numbers in the 5th row of Pascal's Triangle concatenated together, but padded with 0's, is prime. It is also 'quasipalindromic' in the sense of a concatenating several multidigit numbers in reverse order, but not reversing the digits of those individual numbers. [Green]

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