343 423 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
7867686497632479661688231903	28	92.7	2019-04-01 13:46:28

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	589 / 640

Estimated T-Level: 29.6 ⓘ

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

Status	Date	User	Residue	Shift
Verified (Factored)		David Slowinski	F40	0
Verified (Factored)		John Sweeney	11A5C852C5AC4F40	0
Verified (Factored)		Mike Gach	11A5C852C5AC4F40	0
Verified (Factored)		Eivind Triel	11A5C852C5AC4F40	288441
Verified (Factored)	2016-06-01	MadPoo	11A5C852C5AC4F40	296545

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2019-04-02	ANONYMOUS	08D1E64A66BBE5CF	1	81123	5	3
Verified	2019-04-02	artorollo	08D1E64A66BBE5CF	1	140932	5	3

History

Date	User	Type	Result
2019-04-02	artorollo	C-PRP	M343423/7867686497632479661688231903 : 08D1E64A66BBE5CF PRP: Verified PRP without proof (small exponent)
2019-04-02	ANONYMOUS	C-PRP	M343423/7867686497632479661688231903 : 08D1E64A66BBE5CF PRP: Verified PRP without proof (small exponent)
2019-04-01	alex	F-ECM	Factor: 7867686497632479661688231903 / (ECM curve 413, B1=250000, B2=25000000, Sigma=4342127262397565)
2018-02-16	Gordon Spence	NF	no factor from 2^64 to 2^65
2016-10-15	mikr	NF-PM1	B1=60000000, B2=3000000000, E=12
2016-06-01	MadPoo	C-LL	11A5C852C5AC4F40
2015-12-26	Gordon Spence	NF	no factor from 2^63 to 2^64
2015-12-26	Gordon Spence	NF	no factor from 2^62 to 2^63
2015-07-25	NR	NF	no factor from 2^61 to 2^62
2013-06-10	Sid & Andy	NF	no factor from 2^60 to 2^61
2012-02-18	alpertron	NF-PM1	B1=10000000, B2=200000000, E=12
2011-08-14	Joss	NF-PM1	B1=1328231
2009-01-24	Sturle Sunde	NF	no factor from 2^59 to 2^60
2008-12-31	Sturle Sunde	NF	no factor from 2^58 to 2^59