is 2 66863633 - 1
has 20127960 decimal digits
takes 169.016 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
1 primality tests remaining
ResidueStatus
L-L9B166A9B018030__
needs double-check
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual275114.440565.3333%590000107675004.19493.4502%118.635466.5294%1.1961%
PrimeNet2703.573762.8571%280000130000003.56645.3176%7.140164.8322%1.9751%
GPU7227457.218964.8649%450000150000004.55493.9274%61.773966.2448%1.3799%
Difference+1+57.2216+0.4685%+140000-4232500-0.3600-0.4772%+56.8616+0.2846%+0.2846%

Known prime factors:
No known factors for M66863633

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2013-10-03T00:07:00Kage RojiDa-Hang-Out59000010767500---4.195--3.450%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2009-05-10T23:40:001997rj7Manual testing21264--0.053--
2009-12-05T19:28:00GrunwalderGIMPcompute-0-0264265--0.056--
2010-02-09T13:20:00S53072964Bit265266--0.112--
2010-02-14T16:26:00BARBBARITTABARBBARITTA266267--0.224--
2010-02-19T03:58:00BARBBARITTABARBBARITTA267268--0.447--
2010-02-23T03:04:00BARBBARITTABARBBARITTA268269--0.894--
2012-02-17T06:27:00Dr. Nowakazm83269270--1.788--
2012-07-08T08:30:00oodaira01270271--3.576--
2013-09-27T23:26:00kdgehmanManual testing271272--7.153--
2013-09-27T23:26:00kdgehmanManual testing272273--14.31--
2013-09-27T23:26:00kdgehmanManual testing273274--28.61--
2015-04-26T14:32:00TheJudgerManual testing274275--57.22--


ECM factoring results:
No ECM results for M66863633


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2015-06-28T04:43:00ALAN_BROWNWorkPC9B166A9B018030__169.0


PRP results:
No PRP results for M66863633


P-1 factor-bounds graph:
B1 = 590000, B2 = 10767500 (P-1 stage 2)
B1 = 590000 (P-1 stage 1)
104
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108
TF factor-bounds graph:
275
274
273
272
271
270
269
268
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266
265
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2100
Last modified: 2015-06-28T04:43:00+00:00