11920...80451 (2164-digits)
This number is a prime.
Just showing those entries submitted by 'Jobling': (Click here to show all)
1973242146*5039#/35-1 is a titanic twin and Sophie Germain prime, since 1973242146*5039#/35+1 and 2*1973242146*5039#/35-1 are prime. [Rosenthal and
Jobling]
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