18115...04261 (2152-digits)

This number is a prime.

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

381094887*5011#/35-1 is a titanic twin and Sophie Germain prime, since 381094887*5011#/35+1 and 2*381094887*5011#/35-1 are prime. [Rosenthal and Jobling]