1 848 877 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
247404842439955788584561	24	77.7	2020-12-01 06:40:07
287592412994476988653930061119	30	97.9	2011-01-26 06:27:26

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	106 / 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)		Robert Clark	F440F27B3770E8A9	0
Verified (Factored)	1998-12-21	Josh Rosenberg	F440F27B3770E8A9	800237

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-04	Oliver Kruse	6B4F63C80447A306	1	0	1	3
Verified (Factored)	2017-11-06	ATH	6B4F63C80447A306	1	942064	1	3
Verified	2020-12-04	Jinyuan Wang	19B15F6E5544FEDA	2	1644557	5	3
Verified	2020-12-06	roemer2201	19B15F6E5544FEDA	2	1619365	5	3

History

Date	User	Type	Result
2022-04-11	Lisander Viaene	NF-PM1	B1=500000, B2=2835864570
2020-12-06	roemer2201	C-PRP	M1848877/287592412994476988653930061119/247404842439955788584561 : 19B15F6E5544FEDA PRP: Verified PRP without proof (not generated)
2020-12-04	Jinyuan Wang	C-PRP	M1848877/247404842439955788584561/287592412994476988653930061119 : 19B15F6E5544FEDA PRP proof power = 7 PRP: Verified PRP proof never uploaded
2020-12-01	nordi	F-ECM	Factor: 247404842439955788584561 / (ECM curve 7, B1=50000, B2=5000000, Sigma=2846185898770857)
2017-11-06	ATH	C-PRP	M1848877/287592412994476988653930061119 : 6B4F63C80447A306 PRP: Verified PRP without proof (not generated)
2017-10-04	Oliver Kruse	C-PRP	M1848877/287592412994476988653930061119 : 6B4F63C80447A306 PRP: Verified PRP without proof (not generated)
2011-01-26	Lupo	F-ECM	Factor: 287592412994476988653930061119
2011-01-21	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2010-04-08	Architects Cubed	NF	no factor from 2^60 to 2^61