250431285

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250431285 * 2³⁵⁵⁷ - 1 is both a titanic twin prime and a titanic Sophie Germain prime, since 250431285 * 2³⁵⁵⁷ + 1 and 250431285 * 2³⁵⁵⁸ - 1 are prime. [Broadhurst]

Submitted: 2000-09-16 02:07:27; Last Modified: 2008-07-18 14:38:28.