is 2 3628187 - 1
has 1092194 decimal digits
takes 0.381 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L1E62A9CE7C58F584double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27065.859568.5714%30000000100000000012.617011.1058%78.476572.0618%3.4904%
PrimeNet2600.042363.3333%160003200000.00503.0732%0.047364.4602%1.1268%
GPU722640.981065.6250%220004000000.00652.0340%0.987566.3242%0.6992%
Difference+6+64.8785+2.9464%+29978000+999600000+12.6105+9.0718%+77.4890+5.7376%+5.7376%

Known prime factors:
No known factors for M3628187

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-07-06T11:07:00Carsten Kossendeyleela20000245000---0.005--0.707%
2012-01-19T05:58:00Squeeky_SquirrelP4_2600900001620000---0.026--1.869%
2015-11-06T08:28:07Squeeky_SquirrelP4_260017500047687506---0.065--2.755%
2017-05-31T03:36:29Jocelyn Larouchelow 4M35000035000006---0.079--2.859%
2020-07-01T01:33:09axnManual testing3000000060000000012---9.298--10.370%
2020-08-13T12:50:55axnManual testing30000000100000000012---12.62--11.106%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2009-03-11T16:50:00S485122USB-Z260261--0.042--
2011-05-24T11:45:00markrManual testing21262--0.169--
2012-06-05T02:29:00GrunwalderGIMPManual testing21263--0.440--
2016-02-23T16:29:35Mark RoseManual testing262263--0.271--
2015-01-22T10:40:00VictordeHollanderManual testing263264--0.541--
2015-01-22T10:40:00VictordeHollanderManual testing264265--1.030--
2015-10-18T15:17:07ramgeisManual testing265266--2.060--
2016-12-26T04:42:20Gordon SpenceManual testing266267--4.119--
2018-10-01T11:53:14TJAOIManual testing267268--8.239--
2020-10-22T18:14:14axnManual testing268269--16.48--
2022-01-30T19:05:56Gordon SpenceManual testing269270--32.95--


ECM factoring results:

Old Calculation Method

Total ECM effort:7.762 GHz-days
Estimated T-Level:2.500
DigitsB1CurvesCompleteFacMiss
201100050 / 1000.50060.501%
255000050 / 2800.17983.620%

New Calculation Method

Total ECM effort:7.762 GHz-days
Estimated T-Level:2.500
DigitsB1CompleteFacMiss
20110001.96813.974%
25500000.18283.355%
302500000.01298.855%


ECM Summary

B1B2factorcurvesGHz-days
500005000000365.345
50000675000071.206
50000680000071.211


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-07-27T00:00:00ANONYMOUSv4_computers1E62A9CE7C58F5840.381


PRP results:
No PRP results for M3628187


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 = 350000, B2 = 3500000 (P-1 stage 2)
B1 = 175000, B2 = 4768750 (P-1 stage 2)
B1 = 350000 (P-1 stage 1)
B1 = 175000 (P-1 stage 1)
B1 = 90000, B2 = 1620000 (P-1 stage 2)
B1 = 90000 (P-1 stage 1)
B1 = 20000, B2 = 245000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
103
104
105
106
107
108
103
104
105
106
107
108
109
TF factor-bounds graph:
270
269
268
267
266
265
264
263
262
261
250
260
270
280
290
2100
Last modified: 2022-05-30T01:51:14+00:00