3 628 129 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁷¹

TF target 2⁶⁴

TF below 2^72 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	10000000
B2 =	10027887870

ECM

Digits	B1	Curves
25	50000	185 / 280

Estimated T-Level: 23.3 ⓘ

Status	Date	User	Residue	Shift
Verified		Thomas Honold	3E9F23B23551025F	0
Verified	1999-08-07	Rick Pali	3E9F23B23551025F	2132767

History

Date	User	Type	Result
2025-03-09	Joss	NF-PM1	B1=10000000, B2=10027887870
2025-03-06	TJAOI	NF	no factor from 2^70 to 2^71
2024-01-26	Joss	NF-PM1	B1=4755066, B2=9556597050
2024-01-20	Joss	NF-PM1	B1=2377533, B2=4778283510
2022-01-30	Gordon Spence	NF	no factor from 2^69 to 2^70
2020-10-22	axn	NF	no factor from 2^68 to 2^69
2020-08-12	axn	NF-PM1	B1=30000000, B2=1000000000, E=12
2020-06-30	axn	NF-PM1	B1=30000000, B2=600000000, E=12
2018-10-01	TJAOI	NF	no factor from 2^67 to 2^68
2017-05-30	Joss	NF-PM1	B1=350000, B2=3500000, E=6
2016-12-25	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2015-11-06	Squeeky_Squirrel	NF-PM1	B1=175000, B2=4768750, E=6
2015-10-18	ramgeis	NF	no factor from 2^65 to 2^66
2015-01-22	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-01-22	VictordeHollander	NF	no factor from 2^63 to 2^64
2012-06-20	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2012-01-19	Squeeky_Squirrel	NF-PM1	B1=90000, B2=1620000, E=6
2011-05-24	markr	NF	no factor to 2^62
2009-07-06	Carsten Kossendey	NF-PM1	B1=20000, B2=245000
2009-03-11	S485122	NF	no factor from 2^60 to 2^61

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