261 399 217 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Details

Composite: 1 known prime factor

Trial Factored to 2⁶⁸

TF target 2⁸⁰

Factored

Factor	Digits	Bits	Date
170839507640211281	18	57.2	2014-11-14 15:18:05

History

Date	User	Type	Result
2014-11-14	TJAOI	F	Factor: 170839507640211281
2013-11-19	Yan Ruimin China	NF	no factor TF: 65-66
2011-08-13	tsc	NF	no factor TF: 64-65
2010-03-15	Torchwood Institute	NF	no factor TF: 63-64
2010-03-15	Torchwood Institute	NF	no factor TF: 62-63

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