is 2 61769089 - 1
has 18594349 decimal digits
takes 145.100 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L89F6D273E8FE855Cdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27461.938264.8649%580000107300003.85923.7596%65.797466.1858%1.3209%
PrimeNet2703.868462.8571%260000120000003.06435.1402%6.932764.7664%1.9092%
GPU7227461.938264.8649%400000130000003.70073.7200%65.638966.1719%1.3070%
Difference---+180000-2270000+0.1584+0.0396%+0.1584+0.0139%+0.0139%

Known prime factors:
No known factors for M61769089

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2013-05-03T18:24:00GrunwalderGIMPCloud258000010730000---3.859--3.760%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-06-17T00:00:00ANONYMOUSv4_computers21259--0.001--
2003-11-28T00:00:00ANONYMOUSv4_computers21260--0.002--
2004-04-09T00:00:00ANONYMOUSv4_computers21262--0.010--
2016-02-23T17:06:58Mark RoseManual testing262263--0.016--
2009-04-13T14:45:00searchingforprimesHarwich6263264--0.032--
2009-07-30T10:13:00CD264265--0.060--
2009-07-31T11:29:00Sturle Sundegraun.ifi265266--0.121--
2009-10-06T01:42:00arnaudSRV-330266267--0.242--
2009-10-17T09:46:00ANONYMOUS267268--0.484--
2009-11-13T02:27:00Per Jessenbeaufort1268269--0.968--
2012-02-16T06:32:00ANONYMOUS269270--1.936--
2012-10-02T19:40:00tmorrowteapot270271--3.871--
2013-02-14T22:52:00Cow_tippingManual testing271272--7.743--
2013-02-14T22:52:00Cow_tippingManual testing272273--15.49--
2016-02-23T18:20:22AirSquirrelsManual testing273274--30.97--


ECM factoring results:
No ECM results for M61769089


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2013-06-10T20:26:00Markus WernerMW02889F6D273E8FE855C145.1
2021-06-22T17:36:02arnaudsegepo89F6D273E8FE855C145.1


PRP results:
No PRP results for M61769089


P-1 factor-bounds graph:
B1 = 580000, B2 = 10730000 (P-1 stage 2)
B1 = 580000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-06-22T17:36:02+00:00