31 028 317 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
39892990219914408179311	23	75.1	2021-09-21 18:33:42

ECM

Digits	B1	Curves
25	50000	4 / 280

Estimated T-Level: 20.1 ⓘ

TF below 2^62 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)	2006-07-10	Grey Smith	F96679FCE63B5451	30294157
Verified (Factored)	2013-04-12	HardyP Germany	F96679FCE63B5451	2357928

History

Date	User	Type	Result
2021-09-21	ATH	F-PP1	Start=2/7, B1=300000, B2=12300000, Factor: 39892990219914408179311
2019-06-23	LaurV	NF	no factor from 2^71 to 2^72
2018-12-24	ramgeis	NF	no factor from 2^70 to 2^71
2013-04-12	HardyP Germany	C-LL	F96679FCE63B5451
2013-01-26	Chuck	NF	no factor from 2^69 to 2^70
2012-04-17	Stef42	NF	no factor from 2^68 to 2^69
2009-05-29	Carsten Kossendey	NF-PM1	B1=165000, B2=3135000, E=6