405 037 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
485493885992104333911522081311	30	98.6	2019-04-23 05:35:35

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	628 / 640

Estimated T-Level: 29.9 ⓘ

TF below 2^94 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		David Slowinski	1C81	0
Verified (Factored)		Richard Crandall	BF76254AE4B69C81	0
Verified (Factored)		Eivind Triel	BF76254AE4B69C81	385985
Verified (Factored)	2002-01-02	Dennis Pope	BF76254AE4B69C81	175420

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2019-04-23	matzetoni	6D05C789675AF12C	1	337535	5	3
Verified	2019-04-24	artorollo	6D05C789675AF12C	1	310617	5	3

History

Date	User	Type	Result
2019-04-24	artorollo	C-PRP	M405037/485493885992104333911522081311 : 6D05C789675AF12C PRP: Verified PRP without proof (small exponent)
2019-04-23	matzetoni	C-PRP	M405037/485493885992104333911522081311 : 6D05C789675AF12C PRP: Verified PRP without proof (small exponent)
2019-04-23	alex	F-ECM	Factor: 485493885992104333911522081311 / (ECM curve 378, B1=250000, B2=25000000, Sigma=1468414780667097)
2018-11-28	Gordon Spence	NF	no factor from 2^65 to 2^66
2017-12-14	Gordon Spence	NF	no factor from 2^64 to 2^65
2016-09-06	Joss	NF-PM1	B1=10000000, B2=720000000, E=12
2016-06-22	Joss	NF-PM1	B1=10000000, B2=360000000, E=12
2016-05-11	Joss	NF-PM1	B1=10000000, B2=180000000, E=12
2016-03-17	Joss	NF-PM1	B1=7200000
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2015-11-08	Gordon Spence	NF	no factor from 2^63 to 2^64
2015-11-08	Gordon Spence	NF	no factor from 2^62 to 2^63
2015-07-14	NR	NF	no factor from 2^61 to 2^62
2011-04-30	Sid & Andy	NF	no factor from 2^60 to 2^61
2010-05-17	James Hintz	NF-PM1	B1=5000000, B2=140000000, E=12