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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 09:04:04;   Last Modified: 2010-01-05 11:28:45.

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