is 2 89218187 - 1
has 26857351 decimal digits
takes 300.781 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
1 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRPBC8C524FC45A53__verified PRP

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual276171.534564.4737%720000142200007.11513.5212%178.649665.7247%1.2510%
PrimeNet2715.358561.9718%360000170000006.19165.4126%11.550164.0302%2.0583%
GPU7227585.766264.0000%600000200000008.09994.0528%93.866165.4590%1.4590%
Difference+1+85.7682+0.4737%+120000-5780000-0.9848-0.5316%+84.7835+0.2656%+0.2656%

Known prime factors:
No known factors for M89218187

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2018-10-31T20:48:46arnaudGTI06720000142200006---7.115--3.521%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2010-11-08T11:30:00Architects Cubedm1_09264265--0.042--
2013-03-17T17:52:00ANONYMOUS265266--0.084--
2013-03-18T11:05:00timc995dl580_g5266267--0.168--
2013-03-19T05:39:00timc995dl580_g5267268--0.335--
2013-03-19T13:02:00Den nye religionWin8268269--0.670--
2013-03-20T11:44:00Den nye religionWin8269270--1.340--
2013-09-22T01:26:00SMoffatManual testing270271--2.680--
2017-07-07T15:15:16monstManual testing271272--5.361--
2017-08-18T20:59:11Matthias WurtingerManual testing272273--10.72--
2017-08-23T08:37:06Brian BeuningManual testing273274--21.44--
2018-09-30T16:49:25TheJudgerManual testing274275--42.88--
2018-09-30T16:49:25TheJudgerManual testing275276--85.77--


ECM factoring results:
No ECM results for M89218187


Lucas-Lehmer results:
No L-L results for M89218187


PRP results:
dateuseridcompidcofactorsres64PRP
2019-12-01T10:26:16Ben Deloi-03c701617afe37e76BC8C524FC45A53__no


P-1 factor-bounds graph:
B1 = 720000, B2 = 14220000 (P-1 stage 2)
B1 = 720000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2019-12-01T10:26:16+00:00