1 618 333 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
72105309113254726121	20	66.0	2011-11-26 21:26:45

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	107 / 640

Estimated T-Level: 25.8 ⓘ

TF below 2^81 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Joel Smith	B5DEDAB1B5944FF8	0
Verified (Factored)	1999-01-29	Jörg Thomsen	B5DEDAB1B5944FF8	605787

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-02	Oliver Kruse	A0BA5335BFBCD508	1	0	1	3
Verified	2017-11-01	kkmrkkblmbrbk	A0BA5335BFBCD508	1	446568	1	3

History

Date	User	Type	Result
2017-11-01	kkmrkkblmbrbk	C-PRP	M1618333/72105309113254726121 : A0BA5335BFBCD508 PRP: Verified PRP without proof (not generated)
2017-10-02	Oliver Kruse	C-PRP	M1618333/72105309113254726121 : A0BA5335BFBCD508 PRP: Verified PRP without proof (not generated)
2016-03-17	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2011-11-26	BigBrother	F-PM1	Factor: 72105309113254726121
2010-07-30	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2010-05-03	Architects Cubed	NF	no factor from 2^60 to 2^61