is 2 168374387 - 1
has 50685741 decimal digits
takes 1,145.881 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27690.892663.1579%----90.892663.1579%0.0000%
PrimeNet27422.722462.1622%7000004000000028.03685.5275%50.759264.2536%2.0915%
GPU72278363.573764.1026%10000004000000030.83603.9980%394.409765.5377%1.4352%
Difference-2-272.6811-0.9447%-1000000-40000000-30.8360-3.9980%-303.5171-2.3799%-2.3799%

Known prime factors:
No known factors for M168374387

P-1 results:
No P-1 results for M168374387


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2010-07-07T22:34:00carlos56majo2010263264--0.012--
2011-02-16T22:28:00sasaki3ssk_saver264265--0.022--
2013-03-24T13:15:00MPNS1_1_1_v279.win64265266--0.044--
2015-06-04T23:59:00Robert FolzRobert_Study_Desktop266267--0.089--
2016-03-31T14:12:25XZTManual testing267268--0.178--
2017-04-28T02:13:55Andrew BManual testing268269--0.355--
2018-02-20T11:00:22ZenghuiManual testing269270--0.710--
2018-02-20T16:21:05ZenghuiManual testing269270--0.710--
2018-03-19T08:09:58Ruediger EckhardManual testing270271--1.420--
2018-02-27T05:32:32ZenghuiManual testing270271--1.420--
2018-03-19T08:09:58Ruediger EckhardManual testing271272--2.840--
2018-03-19T08:09:58Ruediger EckhardManual testing272273--5.681--
2021-12-16T16:04:22SRBaseManual testing273274--11.36--
2022-04-05T20:55:03Tucker KaoManual testing274275--22.72--
2022-04-05T20:55:04Tucker KaoManual testing275276--45.45--


ECM factoring results:
No ECM results for M168374387


Lucas-Lehmer results:
No L-L results for M168374387


PRP results:
No PRP results for M168374387


TF factor-bounds graph:
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Last modified: 2022-04-05T20:55:04+00:00