2 225 407 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
229736963881431536207	21	67.6	2013-06-14 19:00:21

ECM

Digits	B1	Curves
25	50000	91 / 280

Estimated T-Level: 21.6 ⓘ

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

Status	Date	User	Residue	Shift
Verified (Factored)		David Lambert	E0EF28186B573863	0
Bad	1999-05-09	Jon Kierkegaard	FA71EC5A3D5DBC8A	1495751
Verified (Factored)	1999-11-24	Tim Boyer	E0EF28186B573863	1652213

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-09	Oliver Kruse	FF9C9DB80C6B9153	1	0	1	3
Verified	2017-11-20	ATH	FF9C9DB80C6B9153	1	1304600	1	3

History

Date	User	Type	Result
2022-03-09	LordJulius	NF	no factor from 2^1 to 2^60
2017-11-20	ATH	C-PRP	M2225407/229736963881431536207 : FF9C9DB80C6B9153 PRP: Verified PRP without proof (not generated)
2017-10-09	Oliver Kruse	C-PRP	M2225407/229736963881431536207 : FF9C9DB80C6B9153 PRP: Verified PRP without proof (not generated)
2016-04-04	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2013-06-14	Xyzzy	F-ECM	Factor: 229736963881431536207
2012-04-19	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-01-12	Oscar Östlin	NF-PM1	B1=85000, B2=1593750, E=6
2010-10-21	Oscar Östlin	NF-PM1	B1=75011
2009-01-11	Sturle Sunde	NF	no factor from 2^60 to 2^61