394 931 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
2976657026900690694381693463	28	91.3	2019-04-16 07:53:48

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	255 / 640

Estimated T-Level: 27.0 ⓘ

TF below 2^85 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		John Sweeney	DCD	0
Verified (Factored)		David Slowinski	1DCD	0
Verified (Factored)		Guillermo Ballester Valor	55ED5875B2551DCD	0
Verified (Factored)		Eivind Triel	55ED5875B2551DCD	90825
Verified (Factored)	2001-12-22	Dennis Pope	55ED5875B2551DCD	178719

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2019-04-17	matzetoni	E1198DEE125E7AD9	1	60960	5	3
Verified	2019-04-20	roemer2201	E1198DEE125E7AD9	1	73201	5	3

History

Date	User	Type	Result
2022-03-07	LordJulius	NF	no factor from 2^54 to 2^55
2019-04-30	Gordon Spence	NF	no factor from 2^65 to 2^66
2019-04-20	roemer2201	C-PRP	M394931/2976657026900690694381693463 : E1198DEE125E7AD9 PRP: Verified PRP without proof (small exponent)
2019-04-17	matzetoni	C-PRP	M394931/2976657026900690694381693463 : E1198DEE125E7AD9 PRP: Verified PRP without proof (small exponent)
2019-04-16	alex	F-ECM	Factor: 2976657026900690694381693463 / (ECM curve 5, B1=250000, B2=25000000, Sigma=3237649756377132)
2018-01-18	BloodERazor	NF	no factor from 2^64 to 2^65
2017-01-24	mikr	NF-PM1	B1=60000000, B2=3000000000, E=12
2015-11-19	Gordon Spence	NF	no factor from 2^63 to 2^64
2015-11-19	Gordon Spence	NF	no factor from 2^62 to 2^63
2015-08-25	NR	NF	no factor from 2^61 to 2^62
2012-07-19	alpertron	NF-PM1	B1=10000000, B2=200000000, E=12
2011-02-27	monst	NF	no factor from 2^60 to 2^61
2009-01-27	Sturle Sunde	NF	no factor from 2^59 to 2^60
2009-01-05	Sturle Sunde	NF	no factor from 2^58 to 2^59