is 2 3616621 - 1
has 1088712 decimal digits
takes 0.380 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-
PRP1527596F2E1FA0__verified PRP

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26933.010668.1159%30000000100000000012.617011.8527%45.627671.8951%3.7791%
PrimeNet2600.042563.3333%150003000000.00462.9775%0.047164.4251%1.0918%
GPU722640.984265.6250%200004000000.00621.9821%0.990466.3063%0.6813%
Difference+5+32.0264+2.4909%+29980000+999600000+12.6108+9.8706%+44.6372+5.5887%+5.5887%

Known prime factors (1 factor, 75.6 bits, 0.00208973% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
3616621563837659670576755441032375.5787795089113160831
3 × 17 × 5399 × 28309850819
2021-08-125399283098508192,936.0234.89438.71

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-07-06T10:50:00Carsten Kossendeyleela20000245000---0.005--0.824%
2011-12-16T18:58:00markrtiny2400006180000---0.086--3.426%
2020-06-11T11:19:57axnManual testing3000000060000000012---9.298--11.085%
2020-08-06T10:54:52axnManual testing30000000100000000012---12.62--11.853%
2022-03-04T04:19:28Jocelyn LaroucheManual testing9000090000---0.014--0.717%
2022-03-22T11:10:06Jocelyn LaroucheManual testing100000100000---0.015--0.764%
2022-05-25T14:13:18Jocelyn LaroucheManual testing100000130364850---1.096--4.851%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-07-07T00:00:00ANONYMOUSv4_computers21260--0.042--
2009-03-12T16:38:00S485122USB-Z260261--0.042--
2011-05-29T07:34:00markroldgamer261262--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--


ECM factoring results:

Old Calculation Method

Total ECM effort:4.130 GHz-days
Estimated T-Level:1.350
DigitsB1CurvesCompleteFacMiss
201100027 / 1000.27076.234%
255000027 / 2800.09690.792%

New Calculation Method

Total ECM effort:4.130 GHz-days
Estimated T-Level:1.350
DigitsB1CompleteFacMiss
20110000.87841.541%
25500000.07992.419%
302500000.00599.516%


ECM Summary

B1B2factorcurvesGHz-days
500005000000152.225
50000500000050.742
50000630000071.162


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-08-07T00:00:00Jonathan Champv4_computers938A6287F1FE23__0.380
2000-02-01T00:00:00jbaffordv4_computers4E6C36BE13E436__0.380


PRP results:
dateuseridcompidcofactorsres64PRP
2021-08-12T22:57:19GURA LOVE
56383765967057675544103
1527596F2E1FA0__no


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 = 100000, B2 = 130364850 (P-1 stage 2)
B1 = 240000, B2 = 6180000 (P-1 stage 2)
B1 = 240000 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
B1 = 90000 (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: 2022-05-25T14:13:18+00:00