1 810 561 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
12000431416426228695817	23	73.3	2019-11-22 22:35:02

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	135 / 640

Estimated T-Level: 26.1 ⓘ

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

Status	Date	User	Residue	Shift
Verified (Factored)		Jeff Woods	93C61F18A4279784	0
Verified (Factored)	1999-01-02	Michael Collier	93C61F18A4279784	1524071
Verified (Factored)	2015-07-06	MadPoo	93C61F18A4279784	317017

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2019-11-23	Niels_Mache_Nextcloud	4DBC947FBC1F14B8	1	1498031	5	3
Verified	2019-11-24	GAN	4DBC947FBC1F14B8	1	1274481	5	3

History

Date	User	Type	Result
2019-11-24	GAN	C-PRP	M1810561/12000431416426228695817 : 4DBC947FBC1F14B8 PRP: Verified PRP without proof (not generated)
2019-11-23	Niels_Mache_Nextcloud	C-PRP	M1810561/12000431416426228695817 : 4DBC947FBC1F14B8 PRP: Verified PRP without proof (not generated)
2019-11-22	mnd9	F-ECM	Factor: 12000431416426228695817 / (ECM curve 1, B1=50000, B2=5000000, Sigma=7648137141925032)
2019-07-17	TJAOI	NF	no factor from 2^67 to 2^68
2018-09-20	Joss	NF-PM1	B1=1810561, B2=181056100, E=12
2018-04-16	TJAOI	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2016-02-23	Mark Rose	NF	no factor from 2^61 to 2^62
2015-09-01	ramgeis	NF	no factor from 2^65 to 2^66
2015-07-06	MadPoo	C-LL	93C61F18A4279784
2015-05-14	mikr	NF-PM1	B1=2780000, B2=91760000, E=12
2015-04-22	snme2pm1	NF	no factor from 2^64 to 2^65
2015-04-22	snme2pm1	NF	no factor from 2^63 to 2^64
2014-09-20	Joss	NF-PM1	B1=170900
2014-05-12	Joss	NF-PM1	B1=135450
2011-02-07	Carsten Kossendey	NF-PM1	B1=100000, B2=1650000, E=6
2011-01-21	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2010-04-17	Architects Cubed	NF	no factor from 2^60 to 2^61