3 201 487 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 2^73 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	9604462
B2 =	100677866520

ECM

Digits	B1	Curves
25	50000	200 / 280

Estimated T-Level: 23.6 ⓘ

Status	Date	User	Residue	Shift
Verified		Stephen Wood	85227023525BDF8E	0
Verified	1999-06-15	Alan Lund	85227023525BDF8E	2325708

History

Date	User	Type	Result
2025-07-11	Architects Cubed	NF	no factor from 2^70 to 2^71
2024-10-11	alex4	NF-PM1	B1=9604462, B2=100677866520
2024-01-09	Joss	NF-PM1	B1=2499534, B2=6545096250
2023-08-30	Joss	NF-PM1	B1=1000000, B2=2314322010
2022-02-15	Gordon Spence	NF	no factor from 2^69 to 2^70
2021-01-27	ViliamF	NF	no factor from 2^68 to 2^69
2019-07-18	GdS	NF-PM1	B1=25486653, B2=1044952793, E=12
2019-01-28	TJAOI	NF	no factor from 2^67 to 2^68
2018-07-24	Joss	NF-PM1	B1=400000, B2=4000000, E=6
2018-07-24	Joss	NF-PM1	B1=400000, B2=2428000
2018-07-20	Joss	NF-PM1	B1=400000, B2=1228000, E=6
2017-03-20	Squeeky_Squirrel	NF-PM1	B1=200000, B2=5550000, E=12
2017-03-15	Gordon Spence	NF	no factor from 2^66 to 2^67
2017-01-29	Joss	NF-PM1	B1=186000
2015-09-30	Squeeky_Squirrel	NF-PM1	B1=155000, B2=3952500, E=6
2015-06-21	Tha	NF	no factor from 2^65 to 2^66
2014-11-07	BloodIce	NF	no factor from 2^64 to 2^65
2014-11-07	BloodIce	NF	no factor from 2^63 to 2^64
2014-11-03	Joss	NF-PM1	B1=105632
2014-08-21	Joss	NF-PM1	B1=85584
2013-01-03	dbaugh	NF	no factor from 2^62 to 2^63
2008-11-16	Matthias Wurtinger	NF	no factor from 2^61 to 2^62
2008-11-16	Matthias Wurtinger	NF	no factor from 2^60 to 2^61

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