1 863 451 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
465862751	9	28.8	old
1558453941039570915497	22	70.4	2020-12-04 03:49:09

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	130 / 640

Estimated T-Level: 26.0 ⓘ

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)	2017-10-04	Oliver Kruse	28939B12A76E9669	1	0	1	3
Verified (Factored)	2017-11-07	kkmrkkblmbrbk	28939B12A76E9669	1	306252	1	3
Verified	2020-12-04	mrh	60D87C671CBB670C	2	409268	5	3

History

Date	User	Type	Result
2020-12-04	Ted Prohowich	CERT	PRP Certification Proof certified good
2020-12-04	mrh	C-PRP	M1863451/465862751/1558453941039570915497 : 60D87C671CBB670C PRP proof power = 7 PRP: Verified Proof certified good
2020-12-04	_p95holder_	F-ECM	Factor: 1558453941039570915497 / (ECM curve 4, B1=50000, B2=5000000)
2017-11-07	kkmrkkblmbrbk	C-PRP	M1863451/465862751 : 28939B12A76E9669 PRP: Verified (Factored) PRP without proof (not generated)
2017-10-04	Oliver Kruse	C-PRP	M1863451/465862751 : 28939B12A76E9669 PRP: Verified (Factored) PRP without proof (not generated)
2016-03-16	alpertron	NF-PM1	B1=500000, B2=15000000, E=12