386 131 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
20527733342102689049182864399289	32	104.0	2019-04-13 08:35:42

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	580 / 640

Estimated T-Level: 29.5 ⓘ

TF below 2^93 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Marc Honey	3644842B2B4DDC7F	0
Verified (Factored)		Cornelius Caesar	3644842B2B4DDC7F	0
Verified (Factored)		Eivind Triel	3644842B2B4DDC7F	296035
Verified (Factored)	2002-12-25	Brian J. Beesley	3644842B2B4DDC7F	205693

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2019-04-13	matzetoni	5C6BCAC69542A562	1	119290	5	3
Verified	2019-04-14	Ruzovej	5C6BCAC69542A562	1	137113	5	3

History

Date	User	Type	Result
2019-04-14	Ruzovej	C-PRP	M386131/20527733342102689049182864399289 : 5C6BCAC69542A562 PRP: Verified PRP without proof (small exponent)
2019-04-13	matzetoni	C-PRP	M386131/20527733342102689049182864399289 : 5C6BCAC69542A562 PRP: Verified PRP without proof (small exponent)
2019-04-13	alex	F-ECM	Factor: 20527733342102689049182864399289 / (ECM curve 330, B1=250000, B2=25000000, Sigma=3040885760652307)
2018-02-01	BloodERazor	NF	no factor from 2^64 to 2^65
2017-01-12	mikr	NF-PM1	B1=60000000, B2=3000000000, E=12
2015-11-25	Gordon Spence	NF	no factor from 2^63 to 2^64
2015-11-25	Gordon Spence	NF	no factor from 2^62 to 2^63
2015-08-13	NR	NF	no factor from 2^61 to 2^62
2012-07-23	alpertron	NF-PM1	B1=10000000, B2=200000000, E=12
2011-11-20	lycorn	NF	no factor from 2^60 to 2^61
2009-01-08	Sturle Sunde	NF	no factor from 2^59 to 2^60
2009-01-06	Sturle Sunde	NF	no factor from 2^58 to 2^59