is 2 3845159 - 1
has 1157509 decimal digits
takes 0.404 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LAC6EE9D9C8AE9FF4double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27062.143268.5714%150000007500000008.382810.4064%70.526071.8420%3.2706%
PrimeNet2600.039963.3333%170003400000.00533.1943%0.045264.5046%1.1713%
GPU722640.925765.6250%240005000000.00762.2278%0.933366.3908%0.7658%
Difference+6+61.2176+2.9464%+14976000+749500000+8.3752+8.1786%+69.5928+5.4512%+5.4512%

Known prime factors:
No known factors for M3845159

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-07-27T16:22:00Carsten Kossendeyleela20000270000---0.005--0.738%
2011-10-25T11:29:00Squeeky_SquirrelT7500_2200700001137500---0.020--1.624%
2014-10-18T13:18:00Jocelyn LaroucheManual testing8669286692---0.013--0.612%
2016-02-05T12:18:36Jocelyn LaroucheManual testing23950023950006---0.054--2.488%
2020-11-23T02:00:07Carlos PinhoHomeComputer17300046750006---0.064--2.761%
2021-02-08T02:50:19axnManual testing15000000750000000---8.383--10.406%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-08-07T00:00:00ANONYMOUSv4_computers21260--0.040--
2009-02-26T16:01:00S485122USB-A260261--0.040--
2011-03-05T09:56:00markrut261262--0.080--
2012-02-20T20:14:00GrunwalderGIMPManual testing21263--0.415--
2016-02-23T16:29:41Mark RoseManual testing262263--0.255--
2015-01-18T21:00:00VictordeHollanderManual testing263264--0.511--
2015-01-18T21:00:00VictordeHollanderManual testing264265--0.972--
2016-02-28T22:17:22ramgeisManual testing265266--1.943--
2016-11-21T15:09:27Gordon SpenceManual testing266267--3.887--
2018-08-13T14:25:17TJAOIManual testing267268--7.774--
2020-10-26T10:35:17TJAOIManual testing268269--15.55--
2022-05-16T01:04:52DRobinsonPEManual testing269270--31.09--


ECM factoring results:

Old Calculation Method

Total ECM effort:5.124 GHz-days
Estimated T-Level:1.650
DigitsB1CurvesCompleteFacMiss
201100033 / 1000.33071.773%
255000033 / 2800.11888.864%

New Calculation Method

Total ECM effort:5.124 GHz-days
Estimated T-Level:1.650
DigitsB1CompleteFacMiss
20110001.29227.481%
25500000.11988.741%
302500000.00899.248%


ECM Summary

B1B2factorcurvesGHz-days
500005000000263.906
50000670000071.218


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-09-14T00:00:00ANONYMOUSv4_computersAC6EE9D9C8AE9FF40.404


PRP results:
No PRP results for M3845159


P-1 factor-bounds graph:
B1 = 15000000, B2 = 750000000 (P-1 stage 2)
B1 = 15000000 (P-1 stage 1)
B1 = 173000, B2 = 4675000 (P-1 stage 2)
B1 = 239500, B2 = 2395000 (P-1 stage 2)
B1 = 239500 (P-1 stage 1)
B1 = 173000 (P-1 stage 1)
B1 = 70000, B2 = 1137500 (P-1 stage 2)
B1 = 86692 (P-1 stage 1)
B1 = 70000 (P-1 stage 1)
B1 = 20000, B2 = 270000 (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
260
250
260
270
280
290
2100
Last modified: 2022-05-18T12:40:37+00:00