19 501 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 1 known prime factor. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
4742575576287432116350678617602436393909073	43	141.8	2022-02-11 16:46:49

ECM

Estimated T-Level: 48.3 ⓘ

TF below 2^155 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Unknown	6C15	0
Verified (Factored)		George Woltman	0082B1FC7F95EC15	0
Verified (Factored)		Brian J. Beesley	0082B1FC7F95EC15	0
Verified (Factored)	2015-04-11	MadPoo	0082B1FC7F95EC15	3696

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2022-02-11	Anton Repko	E8CF3AF8AC437D8E	1	12360	5	3
Verified	2022-02-11	SRJ2877	E8CF3AF8AC437D8E	1	15694	5	3

History

Date	User	Type	Result
2022-02-11	SRJ2877	C-PRP	M19501/4742575576287432116350678617602436393909073 : E8CF3AF8AC437D8E PRP: Verified PRP without proof (small exponent)
2022-02-11	Anton Repko	C-PRP	M19501/4742575576287432116350678617602436393909073 : E8CF3AF8AC437D8E PRP: Verified PRP without proof (small exponent)
2022-02-11	Anton Repko	F-ECM	Factor: 4742575576287432116350678617602436393909073 / (ECM curve 287, B1=44000000, B2=44000000)
2021-12-17	-Anonymous-	NF-PM1	B1=40000000000, B2=10005945354344940
2021-05-07	ATH	NF-PP1	Start=2/7, B1=500000000, B2=105500000000
2021-02-21	Ruslan Borisov	NF	no factor from 2^64 to 2^65
2018-04-05	James Hintz	NF-PM1	B1=33680721574, B2=2559734839624, E=12
2018-02-23	snme2pm1	NF	no factor from 2^63 to 2^64
2016-03-25	Sid & Andy	NF	no factor from 2^62 to 2^63
2016-02-23	LaurV	NF	no factor from 2^57 to 2^58
2015-05-29	snme2pm1	NF	no factor from 2^61 to 2^62
2015-04-11	MadPoo	C-LL	0082B1FC7F95EC15
2015-04-03	Jayder	NF-PM1	B1=1172220000, B2=35360118869, E=12
2013-11-17	David Campeau	NF-PM1	B1=1172220000
2013-11-13	David Campeau	NF-PM1	B1=937775000
2013-10-30	David Campeau	NF-PM1	B1=703330000
2013-10-23	David Campeau	NF-PM1	B1=468885000
2013-10-19	David Campeau	NF-PM1	B1=234445000
2012-12-25	bcp19	NF	no factor from 2^60 to 2^61
2010-06-14	chalsall	NF	no factor from 2^59 to 2^60
2010-06-14	chalsall	NF	no factor from 2^58 to 2^59

Username
Password