44497

This number is a prime.

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The last term in the sequence which contains Mersenne prime exponents that are less than 50000 and starts with 4 (4253, 4423, 44497). Note that 4253 starts with one 4, and 4423 starts with two 4's, and 44497 starts with three 4's. [Jeong]

Submitted: 2010-01-05 15:04:04; Last Modified: 2010-01-05 17:28:45.