269 987 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
1940498230606195707774295455176153	34	110.6	2019-01-29 19:48:49

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	527 / 4588

Estimated T-Level: 35.6 ⓘ

TF below 2^113 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		David Slowinski	13DB	0
Verified (Factored)		Unknown	13DB	0
Verified (Factored)		Brian J. Beesley	CE8A7722949C93DB	0
Verified (Factored)		Eivind Triel	CE8A7722949C93DB	178407
Verified (Factored)	2001-11-10	Brian J. Beesley	CE8A7722949C93DB	188807

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2019-01-29	ATH	43C2352EA6EA12EF	1	228522	5	3
Verified	2019-01-30	_p95holder_	43C2352EA6EA12EF	1	165640	5	3
Verified	2019-01-30	kkmrkkblmbrbk	43C2352EA6EA12EF	1	192172	5	3

History

Date	User	Type	Result
2022-03-07	LordJulius	NF	no factor from 2^54 to 2^55
2019-01-30	kkmrkkblmbrbk	C-PRP	M269987/1940498230606195707774295455176153 : 43C2352EA6EA12EF PRP: Verified PRP without proof (small exponent)
2019-01-30	_p95holder_	C-PRP	M269987/1940498230606195707774295455176153 : 43C2352EA6EA12EF PRP: Verified PRP without proof (small exponent)
2019-01-29	ATH	C-PRP	M269987/1940498230606195707774295455176153 : 43C2352EA6EA12EF PRP: Verified PRP without proof (small exponent)
2019-01-29	kkmrkkblmbrbk	F-ECM	Factor: 1940498230606195707774295455176153 / (ECM curve 428, B1=1000000, B2=100000000, Sigma=6144280486019790)
2018-03-22	Gordon Spence	NF	no factor from 2^64 to 2^65
2016-02-23	Mark Rose	NF	no factor from 2^57 to 2^58
2015-12-08	Gordon Spence	NF	no factor from 2^63 to 2^64
2015-12-08	Gordon Spence	NF	no factor from 2^62 to 2^63
2015-08-25	NR	NF	no factor from 2^61 to 2^62
2013-08-17	Markus Tervooren	NF-PM1	B1=20000000, B2=2000000000, E=12
2013-07-06	lycorn	NF	no factor from 2^60 to 2^61
2012-02-26	Joss	NF-PM1	B1=2268093
2011-02-18	Joss	NF-PM1	B1=2000000
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