3 691 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁶⁶

TF target 2⁴⁴

TF below 2^217 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	216000000000
B2 =	1000251878695529460

ECM

Estimated T-Level: 67.0 ⓘ

Status	Date	User	Residue	Shift
Verified		Unknown	59CD	0
Verified		George Woltman	3A53E8D4F4BE59CD	0
Verified		Brian J. Beesley	3A53E8D4F4BE59CD	0
Verified	2015-04-11	MadPoo	3A53E8D4F4BE59CD	2168

Assigned

Assigned	User	Work Type	Stage	% Done	Updated	Expired
2025-02-01	Kamil Gorski	factor P-1 small	S1	74.34 %	2025-02-22

History

Date	User	Type	Result
2024-10-12	timc995	NF-PM1	B1=216000000000, B2=1000251878695529460
2024-09-30	MooMoo2	NF-PM1	B1=123000000000, B2=161232271979068290
2023-08-13	masser	NF-PP1	Start=6/5, B1=2530000000, B2=452870000000
2023-07-11	masser	NF-PP1	Start=189/53, B1=2530000000, B2=101200000000
2023-07-07	masser	NF-PM1	B1=72000000000, B2=90401203222730400
2022-05-02	Anton Repko	NF	no factor from 2^65 to 2^66
2021-05-13	ATH	NF-PP1	Start=2/7, B1=1000000000, B2=241000000000
2020-12-28	Anton Repko	NF	no factor from 2^64 to 2^65
2018-04-15	snme2pm1	NF	no factor from 2^63 to 2^64
2016-11-28	snme2pm1	NF	no factor from 2^62 to 2^63
2016-05-19	-Anonymous-	NF-PM1	B1=400000000000, B2=4000000000000, E=12
2016-05-12	-Anonymous-	NF-PM1	B1=200000000000, B2=2000000000000, E=12
2016-05-08	-Anonymous-	NF-PM1	B1=100000000000, B2=1000000000000, E=12
2016-02-23	LaurV	NF	no factor from 2^57 to 2^58
2015-07-30	snme2pm1	NF	no factor from 2^61 to 2^62
2015-04-11	MadPoo	C-LL	3A53E8D4F4BE59CD
2015-02-19	mikr	NF-PM1	B1=28000000000, B2=2200000000000, E=12
2015-02-01	Jayder	NF-PM1	B1=3092987047, B2=201044158061, E=12
2012-09-29	bcp19	NF	no factor from 2^60 to 2^61
2011-04-23	Joss	NF-PM1	B1=10000000000
2011-02-05	monst	NF	no factor from 2^58 to 2^60

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