1 420 931 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
25630938099031	14	44.5	old
62328751821769	14	45.8	2014-01-30 08:32:55
47200775486003388838621129	26	85.3	2019-02-15 12:26:46
1029488788263813087465669249831374857	37	119.6	2015-02-16 12:52:46

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	105 / 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	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-05	Oliver Kruse	1E5E2D8DBC75DDF2	3	0	1	3
Verified (Factored)	2017-10-26	kkmrkkblmbrbk	1E5E2D8DBC75DDF2	3	902659	1	3
Verified	2019-02-15	ATH	2222A244CCAC8149	4	335357	5	3
Verified	2019-02-16	kkmrkkblmbrbk	2222A244CCAC8149	4	716597	5	3

P-1 factors

Date	Factor	B1	B2
2015-02-16	1029488788263813087465669249831374857	500000	15000000

History

Date	User	Type	Result
2019-02-16	kkmrkkblmbrbk	C-PRP	M1420931/25630938099031/62328751821769/1029488788263813087465669249831374857/47200775486003388838621129 : 2222A244CCAC8149 PRP: Verified PRP without proof (not generated)
2019-02-15	ATH	C-PRP	M1420931/25630938099031/62328751821769/1029488788263813087465669249831374857/47200775486003388838621129 : 2222A244CCAC8149 PRP: Verified PRP without proof (not generated)
2019-02-15	TJAOI	F-ECM	Factor: 47200775486003388838621129 / (ECM curve 124, B1=50000, B2=5000000)
2017-10-26	kkmrkkblmbrbk	C-PRP	M1420931/25630938099031/62328751821769/1029488788263813087465669249831374857 : 1E5E2D8DBC75DDF2 PRP: Verified PRP without proof (not generated)
2017-10-05	Oliver Kruse	C-PRP	M1420931/25630938099031/62328751821769/1029488788263813087465669249831374857 : 1E5E2D8DBC75DDF2 PRP: Verified PRP without proof (not generated)
2017-09-30	Oliver Kruse	C-PRP	M1420931/25630938099031/62328751821769/1029488788263813087465669249831374857 : 1E5E2D8DBC75DDF2 PRP without proof (not generated)
2015-02-16	alpertron	F-PM1	Factor: 1029488788263813087465669249831374857 / (P-1, B1=500000, B2=15000000, E=12)
2014-01-30	TJAOI	F	Factor: 62328751821769