2 230 643 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
120481325231722221929	21	66.7	2016-01-06 13:56:05

ECM

Digits	B1	Curves
25	50000	113 / 280

Estimated T-Level: 22.0 ⓘ

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

Status	Date	User	Residue	Shift
Verified (Factored)		Jay R. Hill	38E68BC59B3DA424	0
Bad	1999-03-26	WeaCheslaw L. Oleinik	33B7355ED3F5BFB6	381586
Verified (Factored)	1999-06-06	Richard Rankin	38E68BC59B3DA424	1563562

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-30	alpertron	F870B726EFBD4C47	1	0	1	3
Verified	2017-10-28	Oliver Kruse	F870B726EFBD4C47	1	502995	1	3

P-1 factors

Date	Factor	B1	B2
2016-01-06	120481325231722221929	2000000	65000000

History

Date	User	Type	Result
2017-10-28	Oliver Kruse	C-PRP	M2230643/120481325231722221929 : F870B726EFBD4C47 PRP: Verified PRP without proof (not generated)
2017-09-30	alpertron	C-PRP	M2230643/120481325231722221929 : F870B726EFBD4C47 PRP: Verified PRP without proof (not generated)
2016-04-11	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2016-01-06	Alexander Dubrovin	F-PM1	Factor: 120481325231722221929 / (P-1, B1=2000000, B2=65000000, E=12)
2015-11-25	Alexander Dubrovin	NF-PM1	B1=1000000, B2=10000000, E=12
2015-10-25	ramgeis	NF	no factor from 2^65 to 2^66
2015-05-06	Squeeky_Squirrel	NF-PM1	B1=160000, B2=4600000, E=6
2015-03-06	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-06	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-09-30	Joss	NF-PM1	B1=142548
2014-05-26	Joss	NF-PM1	B1=113774
2013-12-03	LaurV	NF	no factor from 2^62 to 2^63
2012-04-20	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-01-13	Oscar Östlin	NF-PM1	B1=85000, B2=1615000, E=6
2010-10-26	Oscar Östlin	NF-PM1	B1=75011
2009-01-11	Sturle Sunde	NF	no factor from 2^60 to 2^61