2 195 933 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 1 known prime factor. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
1518364642729407920033	22	70.4	2010-04-12 16:32:02

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	208 / 640

Estimated T-Level: 26.6 ⓘ

TF below 2^83 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)	1998-02-08	Kriang Lerdsuwanakij	C70403643E634179	0
Verified (Factored)	1999-02-07	Alexander Zimmermann	C70403643E634179	440342

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-09	Oliver Kruse	6C3EB9F85E89DDA2	1	0	1	3
Verified	2017-11-19	kkmrkkblmbrbk	6C3EB9F85E89DDA2	1	821875	1	3

History

Date	User	Type	Result
2022-03-09	LordJulius	NF	no factor from 2^1 to 2^60
2017-11-19	kkmrkkblmbrbk	C-PRP	M2195933/1518364642729407920033 : 6C3EB9F85E89DDA2 PRP: Verified PRP without proof (not generated)
2017-10-09	Oliver Kruse	C-PRP	M2195933/1518364642729407920033 : 6C3EB9F85E89DDA2 PRP: Verified PRP without proof (not generated)
2016-03-29	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2010-04-12	James Hintz	F-ECM	Factor: 1518364642729407920033
2009-01-08	Sturle Sunde	NF	no factor from 2^61 to 2^62
2009-01-02	Sturle Sunde	NF	no factor from 2^60 to 2^61