12345...15253 (76-digits)

This number is a prime.

                                                                      123457
8910111314 1516171921 2223252627 2931323334 3537383941 4344454647 4950515253

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

The largest prime number less than a googol formed from concatenation of first n deficient numbers (case n=42). [Gupta]