2 243 833 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
50393028734684988538661994270751	32	105.3	2015-12-04 15:14:23

ECM

Digits	B1	Curves
25	50000	85 / 280

Estimated T-Level: 21.5 ⓘ

TF below 2^66 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Mischa Kenn	557712F7F8CEC82E	0
Verified (Factored)	1999-03-26	William Galway	557712F7F8CEC82E	1486247

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-30	alpertron	CD92BAE244F45452	1	0	1	3
Verified	2017-10-28	Oliver Kruse	CD92BAE244F45452	1	783642	1	3

P-1 factors

Date	Factor	B1	B2
2015-12-04	50393028734684988538661994270751	1000000	7000000

History

Date	User	Type	Result
2022-03-09	LordJulius	NF	no factor from 2^1 to 2^60
2017-10-28	Oliver Kruse	C-PRP	M2243833/50393028734684988538661994270751 : CD92BAE244F45452 PRP: Verified PRP without proof (not generated)
2017-09-30	alpertron	C-PRP	M2243833/50393028734684988538661994270751 : CD92BAE244F45452 PRP: Verified PRP without proof (not generated)
2016-04-27	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2015-12-04	Alexander Dubrovin	F-PM1	Factor: 50393028734684988538661994270751 / (P-1, B1=1000000, B2=7000000, E=12)
2015-10-26	ramgeis	NF	no factor from 2^65 to 2^66
2015-03-10	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-10	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-08-25	-Anonymous-	NF-PM1	B1=128605
2013-12-04	LaurV	NF	no factor from 2^62 to 2^63
2012-05-03	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-01-07	markr	NF-PM1	B1=100000, B2=2075000, E=6
2010-11-11	Joss	NF-PM1	B1=30000
2009-01-16	Sturle Sunde	NF	no factor from 2^60 to 2^61