is 2 3616661 - 1
has 1088724 decimal digits
takes 0.380 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L9C2253FC1F9BAC8Fdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27066.069468.5714%30000000100000000012.617011.1030%78.686472.0610%3.4895%
PrimeNet2600.042563.3333%150003000000.00462.9775%0.047164.4251%1.0918%
GPU722640.984165.6250%200004000000.00621.9821%0.990366.3064%0.6814%
Difference+6+65.0853+2.9464%+29980000+999600000+12.6108+9.1209%+77.6960+5.7546%+5.7546%

Known prime factors:
No known factors for M3616661

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-07-06T10:50:00Carsten Kossendeyleela20000245000---0.005--0.707%
2011-12-16T20:02:00markrtiny2400006180000---0.086--3.078%
2020-06-11T11:19:57axnManual testing3000000060000000012---9.298--10.367%
2020-08-06T10:54:52axnManual testing30000000100000000012---12.62--11.103%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-07-07T00:00:00ANONYMOUSv4_computers21260--0.042--
2009-03-12T05:54:00S485122USB-A260261--0.042--
2011-05-29T06:35:00markroldgamer261262--0.085--
2012-06-05T02:29:00GrunwalderGIMPManual testing21263--0.441--
2016-02-23T16:29:35Mark RoseManual testing262263--0.271--
2015-01-20T20:49:00VictordeHollanderManual testing263264--0.543--
2015-01-20T20:49:00VictordeHollanderManual testing264265--1.033--
2015-10-18T15:17:02ramgeisManual testing265266--2.066--
2016-12-23T23:58:57Gordon SpenceManual testing266267--4.132--
2018-11-26T14:19:27TJAOIManual testing267268--8.265--
2020-10-20T12:03:51axnManual testing268269--16.53--
2022-01-27T12:04:24Gordon SpenceManual testing269270--33.06--


ECM factoring results:

Old Calculation Method

Total ECM effort:7.145 GHz-days
Estimated T-Level:2.350
DigitsB1CurvesCompleteFacMiss
201100047 / 1000.47062.353%
255000047 / 2800.16884.522%

New Calculation Method

Total ECM effort:7.145 GHz-days
Estimated T-Level:2.350
DigitsB1CompleteFacMiss
20110001.83016.039%
25500000.16984.419%
302500000.01198.936%


ECM Summary

B1B2factorcurvesGHz-days
500005000000405.935
50000680000071.210


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-12-01T00:00:00ANONYMOUSv4_computers9C2253FC1F9BAC8F0.380


PRP results:
No PRP results for M3616661


P-1 factor-bounds graph:
B1 = 30000000, B2 = 1000000000 (P-1 stage 2)
B1 = 30000000, B2 = 600000000 (P-1 stage 2)
B1 = 30000000 (P-1 stage 1)
B1 = 240000, B2 = 6180000 (P-1 stage 2)
B1 = 240000 (P-1 stage 1)
B1 = 20000, B2 = 245000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-04-14T10:17:58+00:00