1 260 877 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
295308856121652065144821431143	30	97.9	2019-10-02 20:57:34

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	164 / 640

Estimated T-Level: 26.3 ⓘ

TF below 2^82 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Morris Thompson	D8B4F7729F48CF2E	0
Verified (Factored)		Simon Burge	D8B4F7729F48CF2E	0
Verified (Factored)		Brian J. Beesley	D8B4F7729F48CF2E	304499
Verified (Factored)	2016-06-01	MadPoo	D8B4F7729F48CF2E	1192543

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2019-10-03	Daniil Tsarkov	DBFB3B9AE0087E27	1	931698	5	3
Verified	2019-10-03	Niels_Mache_Nextcloud	DBFB3B9AE0087E27	1	656157	5	3

History

Date	User	Type	Result
2019-10-03	Niels_Mache_Nextcloud	C-PRP	M1260877/295308856121652065144821431143 : DBFB3B9AE0087E27 PRP: Verified PRP without proof (not generated)
2019-10-03	Daniil Tsarkov	C-PRP	M1260877/295308856121652065144821431143 : DBFB3B9AE0087E27 PRP: Verified PRP without proof (not generated)
2019-10-02	_p95holder_	F-ECM	Factor: 295308856121652065144821431143 / (ECM curve 264, B1=50000, B2=5000000, Sigma=3987321284330159)
2018-09-16	Yxinity	NF	no factor from 2^66 to 2^67
2016-06-01	MadPoo	C-LL	D8B4F7729F48CF2E
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2015-09-23	ramgeis	NF	no factor from 2^65 to 2^66
2015-04-09	monst	NF	no factor from 2^64 to 2^65
2015-04-08	omylist	NF	no factor from 2^63 to 2^64
2015-02-04	mikr	NF-PM1	B1=4218475, B2=156083565, E=12
2014-09-29	Joss	NF-PM1	B1=250904
2012-10-11	dbaugh	NF	no factor from 2^62 to 2^63
2011-05-09	Xyzzy	NF	no factor from 2^61 to 2^62
2009-02-17	Sturle Sunde	NF	no factor from 2^60 to 2^61