3 737 197 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
4340568921571938817608763001	28	91.8	2015-10-23 02:09:07

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)		Michael D. Sandburg	D187EC8BB0046CD9	0
Verified (Factored)	1999-10-29	Phillip Grimm	D187EC8BB0046CD9	2217482

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-20	kkmrkkblmbrbk	B527209CC217EF12	1	0	1	3
Verified	2017-12-03	Oliver Kruse	B527209CC217EF12	1	3664237	1	3

P-1 factors

Date	Factor	B1	B2
2015-10-23	4340568921571938817608763001	1600000	66000000

History

Date	User	Type	Result
2022-05-17	Joss	NF-PM1	B1=500000, B2=130364850
2017-12-03	Oliver Kruse	C-PRP	M3737197/4340568921571938817608763001 : B527209CC217EF12 PRP: Verified PRP without proof (not generated)
2017-09-20	kkmrkkblmbrbk	C-PRP	M3737197/4340568921571938817608763001 : B527209CC217EF12 PRP: Verified PRP without proof (not generated)
2015-10-23	mikr	F-PM1	Factor: 4340568921571938817608763001 / (P-1, B1=1600000, B2=66000000, E=12)
2015-01-23	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-01-23	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-02-09	Squeeky_Squirrel	NF-PM1	B1=85000, B2=1445000, E=6
2012-05-10	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2011-05-08	Grant McCracken	NF	no factor from 2^61 to 2^62
2009-07-06	Carsten Kossendey	NF-PM1	B1=20000, B2=265000
2009-03-06	S485122	NF	no factor from 2^60 to 2^61