426 229 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
1497550554637189203664321	25	80.3	2019-05-05 10:45:08

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	206 / 640

Estimated T-Level: 26.6 ⓘ

TF below 2^83 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		David Slowinski	4DB1	0
Verified (Factored)		Jens J Loesel	D158A5D3E1C1CDB1	0
Verified (Factored)		Eivind Triel	D158A5D3E1C1CDB1	286422
Verified (Factored)	2002-02-10	Dennis Pope	D158A5D3E1C1CDB1	127741

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2019-05-05	Niels_Mache_Nextcloud	DC53700518377A44	1	157657	5	3
Verified	2019-05-06	kkmrkkblmbrbk	DC53700518377A44	1	232187	5	3

History

Date	User	Type	Result
2019-05-06	kkmrkkblmbrbk	C-PRP	M426229/1497550554637189203664321 : DC53700518377A44 PRP: Verified PRP without proof (small exponent)
2019-05-05	Niels_Mache_Nextcloud	C-PRP	M426229/1497550554637189203664321 : DC53700518377A44 PRP: Verified PRP without proof (small exponent)
2019-05-05	alex	F-ECM	Factor: 1497550554637189203664321 / (ECM curve 6, B1=250000, B2=25000000, Sigma=1313561812957207)
2018-12-09	Gordon Spence	NF	no factor from 2^65 to 2^66
2017-12-21	Gordon Spence	NF	no factor from 2^64 to 2^65
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2015-11-15	Gordon Spence	NF	no factor from 2^63 to 2^64
2015-11-15	Gordon Spence	NF	no factor from 2^62 to 2^63
2013-01-03	markr	NF-PM1	B1=25000000, B2=1000000000, E=12
2012-12-01	dbaugh	NF	no factor from 2^61 to 2^62
2012-11-27	dbaugh	NF	no factor from 2^60 to 2^61
2012-05-29	Joss	NF-PM1	B1=3011314
2011-08-09	Joss	NF-PM1	B1=1003771
2010-08-01	Rob_Dee	NF-PM1	B1=1000000, B2=2000000, E=6
2010-07-31	Rob_Dee	NF-PM1	B1=500000, B2=1000000