3 919 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 2^214 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	2000000000000
B2 =	9223372036854775807

ECM

Estimated T-Level: 66.0 ⓘ

Status	Date	User	Residue	Shift
Verified		Unknown	1D50	0
Verified		George Woltman	F0E8B4DAF31F1D50	0
Verified		Brian J. Beesley	F0E8B4DAF31F1D50	0
Verified	2015-04-11	MadPoo	F0E8B4DAF31F1D50	531

History

Date	User	Type	Result
2025-06-20	-Anonymous-	NF-PM1	B1=4000000000000, B2=12016700776795795080
2025-03-07	Kamil Gorski	NF-PM1	B1=2000000000000, B2=9225331876849288200
2024-10-13	timc995	NF-PM1	B1=216000000000, B2=1000251878695529460
2023-08-13	masser	NF-PP1	Start=6/5, B1=2360000000, B2=422440000000
2023-07-11	masser	NF-PP1	Start=132/23, B1=2360000000, B2=94400000000
2023-05-15	JacobZ	NF-PM1	B1=67000000000, B2=674804699646066990
2022-06-12	Anton Repko	NF	no factor from 2^65 to 2^66
2021-05-13	ATH	NF-PP1	Start=2/7, B1=1000000000, B2=241000000000
2021-01-29	Anton Repko	NF	no factor from 2^64 to 2^65
2018-06-03	snme2pm1	NF	no factor from 2^63 to 2^64
2016-11-08	snme2pm1	NF	no factor from 2^62 to 2^63
2016-05-14	-Anonymous-	NF-PM1	B1=200000000000, B2=2000000000000, E=12
2016-05-12	-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	F0E8B4DAF31F1D50
2015-04-01	mikr	NF-PM1	B1=30000000000, B2=2400000000000, E=12
2015-02-06	Jayder	NF-PM1	B1=3092987047, B2=201044158061, E=12
2012-09-29	bcp19	NF	no factor from 2^60 to 2^61
2011-04-25	Joss	NF-PM1	B1=10000000000
2011-02-15	monst	NF	no factor from 2^58 to 2^60

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