2 005 981 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
44131583	8	25.4	old
186600364583	12	37.4	2008-07-15 07:49:15
302036547209	12	38.1	2008-07-15 07:49:15
847330863621308514961	21	69.5	2021-04-14 11:45:14

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	165 / 640

Estimated T-Level: 26.3 ⓘ

TF below 2^82 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	B20EC11B2AF0F9B1	3	0	1	3
Verified (Factored)	2017-11-13	kkmrkkblmbrbk	B20EC11B2AF0F9B1	3	1810542	1	3
Verified	2021-04-14	mikr	0899DD9C6D1A3C82	4	1042383	5	3
Verified	2021-04-17	Joe S.	0899DD9C6D1A3C82	4	1322083	5	3

History

Date	User	Type	Result
2021-04-17	Yoon	CERT	PRP Certification Proof certified good
2021-04-17	Joe S.	C-PRP	M2005981/44131583/186600364583/302036547209/847330863621308514961 : 0899DD9C6D1A3C82 PRP proof power = 7 PRP: Verified Proof certified good
2021-04-14	Simon Josefsson	CERT	PRP Certification Proof certified good
2021-04-14	mikr	C-PRP	M2005981/44131583/186600364583/302036547209/847330863621308514961 : 0899DD9C6D1A3C82 PRP proof power = 7 PRP: Verified Proof certified good
2021-04-14	_p95holder_	F-ECM	Factor: 847330863621308514961 / (ECM curve 2, B1=50000, B2=5000000)
2017-11-13	kkmrkkblmbrbk	C-PRP	M2005981/44131583/186600364583/302036547209 : B20EC11B2AF0F9B1 PRP: Verified (Factored) PRP without proof (not generated)
2017-10-05	Oliver Kruse	C-PRP	M2005981/44131583/186600364583/302036547209 : B20EC11B2AF0F9B1 PRP: Verified (Factored) PRP without proof (not generated)
2016-03-17	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2008-07-15	J Feitsma	F	Factor: 302036547209
2008-07-15	J Feitsma	F	Factor: 186600364583