3 381 251 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
13012535728324526423	20	63.5	2014-10-24 01:24:03

ECM

Digits	B1	Curves
25	50000	9 / 280

Estimated T-Level: 20.2 ⓘ

TF below 2^62 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Stephan Schaumann	F0371D71880B37CA	0
Verified (Factored)	1999-09-30	Ernst Priem	F0371D71880B37CA	3346238

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-11-05	kkmrkkblmbrbk	A361B0CED4E880CE	1	279096	5	3
Verified	2017-11-20	Oliver Kruse	A361B0CED4E880CE	1	720376	5	3

History

Date	User	Type	Result
2022-09-05	Joss	NF-PM1	B1=1127083, B2=213444000
2022-04-24	LordJulius	NF	no factor from 2^66 to 2^67
2022-04-24	LordJulius	NF	no factor from 2^65 to 2^66
2022-04-24	LordJulius	NF	no factor from 2^64 to 2^65
2022-04-24	LordJulius	NF	no factor from 2^62 to 2^63
2022-04-24	LordJulius	NF	no factor from 2^1 to 2^62
2022-01-09	Joss	NF-PM1	B1=1127083, B2=111642300
2021-07-01	Joss	NF	no factor from 2^67 to 2^68
2021-03-13	Joss	NF-PM1	B1=338125, B2=3719376, E=6
2017-11-20	Oliver Kruse	C-PRP	M3381251/13012535728324526423 : A361B0CED4E880CE PRP: Verified PRP without proof (not generated)
2017-11-05	kkmrkkblmbrbk	C-PRP	M3381251/13012535728324526423 : A361B0CED4E880CE PRP: Verified PRP without proof (not generated)
2014-10-24	Sid & Andy	F-ECM	Factor: 13012535728324526423 / (ECM curve 3, B1=50000, B2=5000000)
2014-10-12	Joss	NF-PM1	B1=97964
2014-06-26	-Anonymous-	NF-PM1	B1=78982
2012-11-15	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2011-10-20	USAFSS	NF-PM1	B1=60000, B2=930000, E=6
2011-08-25	Grant McCracken	NF	no factor from 2^61 to 2^62
2009-07-09	Carsten Kossendey	NF-PM1	B1=15000, B2=206250
2009-03-26	S485122	NF	no factor from 2^60 to 2^61