19 189 693 Exponent Status

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

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M_n

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Factored

Factor	Digits	Bits	Date
2827158705724343226180151	25	81.2	2019-09-15 08:50:28

ECM

Digits	B1	Curves
25	50000	1 / 280

Estimated T-Level: 20.0 ⓘ

TF below 2^61 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)	2003-06-17	Gary Galloway	90348C075FA06A33	3903397
Verified (Factored)	2007-04-23	Phil Nelson	90348C075FA06A33	6602535

History

Date	User	Type	Result
2019-09-15	Keysarecool	F-ECM	Factor: 2827158705724343226180151 / (ECM curve 1, B1=50000, B2=5000000, Sigma=4590582357714795)
2017-11-30	ramgeis	NF	no factor from 2^68 to 2^69
2014-07-06	Nesowa	NF	no factor from 2^67 to 2^68
2014-07-06	Nesowa	NF	no factor from 2^66 to 2^67

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