2 191 811 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
193175849044280903202823	24	77.4	2015-12-15 20:19:25

ECM

Digits	B1	Curves
25	50000	117 / 280

Estimated T-Level: 22.1 ⓘ

TF below 2^68 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)	1997-11-21	Dongsheng Liu	F89F515710145EAB	0
Verified (Factored)	1998-03-23	Chad Michael Reiss	F89F515710145EAB	0
Verified (Factored)	1999-02-14	Stephen Scott	F89F515710145EAB	841177

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-30	alpertron	D62A667614F2C0BC	1	0	1	3
Verified	2017-10-25	Oliver Kruse	D62A667614F2C0BC	1	1054792	1	3

History

Date	User	Type	Result
2022-03-09	LordJulius	NF	no factor from 2^1 to 2^60
2017-10-25	Oliver Kruse	C-PRP	M2191811/193175849044280903202823 : D62A667614F2C0BC PRP: Verified PRP without proof (not generated)
2017-09-30	alpertron	C-PRP	M2191811/193175849044280903202823 : D62A667614F2C0BC PRP: Verified PRP without proof (not generated)
2016-04-02	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2015-12-15	guru	F-ECM	Factor: 193175849044280903202823 / (ECM curve 1, B1=50000, B2=5000000)
2015-03-28	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-28	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-10-12	Joss	NF-PM1	B1=148568
2014-06-26	-Anonymous-	NF-PM1	B1=119284
2013-01-23	dbaugh	NF	no factor from 2^62 to 2^63
2011-01-11	markr	NF-PM1	B1=90000, B2=1620000, E=6
2010-11-09	Joss	NF-PM1	B1=30000
2010-11-04	Joss	NF-PM1	B1=15000
2009-01-09	Sturle Sunde	NF	no factor from 2^61 to 2^62
2009-01-03	Sturle Sunde	NF	no factor from 2^60 to 2^61