2 218 609 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
2531846160199216153	19	61.1	2016-04-05 12:10:43
2009191768983034662641	22	70.8	2009-12-19 13:39:01

ECM

Digits	B1	Curves
25	50000	94 / 280

Estimated T-Level: 21.7 ⓘ

TF below 2^67 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Eric Prestemon	575DDCFBA1ADDDA2	0
Verified (Factored)	1999-02-21	Stuart Turner	575DDCFBA1ADDDA2	2193607

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-10	kkmrkkblmbrbk	B95B54333DF0B48D	2	0	1	3
Verified	2017-10-26	Oliver Kruse	B95B54333DF0B48D	2	954841	1	3

History

Date	User	Type	Result
2022-03-09	LordJulius	NF	no factor from 2^1 to 2^60
2021-06-29	Dylan Delgado	NF-PM1	B1=1000000, B2=106000000
2017-10-26	Oliver Kruse	C-PRP	M2218609/2009191768983034662641/2531846160199216153 : B95B54333DF0B48D PRP: Verified PRP without proof (not generated)
2017-10-10	kkmrkkblmbrbk	C-PRP	M2218609/2009191768983034662641/2531846160199216153 : B95B54333DF0B48D PRP: Verified PRP without proof (not generated)
2016-04-27	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2016-04-05	TJAOI	F	Factor: 2531846160199216153 / TF: 61-62
2009-12-19	SubPrime	F-ECM	Factor: 2009191768983034662641
2009-01-10	Sturle Sunde	NF	no factor from 2^60 to 2^61