is 2 3666253 - 1
has 1103653 decimal digits
takes 0.385 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP0CD52BF383E4980Cverified PRP

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27065.175768.5714%300000006000000009.298110.3784%74.473871.8332%3.2618%
PrimeNet2600.041963.3333%160003200000.00503.0788%0.046964.4622%1.1289%
GPU722640.970865.6250%220004000000.00652.0378%0.977366.3255%0.7005%
Difference+6+64.2049+2.9464%+29978000+599600000+9.2916+8.3406%+73.4965+5.5077%+5.5077%

Known prime factors (1 factor, 74.5 bits, 0.00203265% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
3666253271285642126778811999592374.5223699767066358743
3699767066358743
2021-06-30136997670663587431,807.730,697,68757,334,730

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-07-11T19:28:00Carsten Kossendeydurandal20000260000---0.005--0.722%
2012-02-06T04:03:00Squeeky_SquirrelP4_2600900001642500---0.027--1.878%
2016-06-22T02:48:57Jocelyn LaroucheManual testing9000032850006---0.040--2.214%
2016-10-03T01:22:54Jocelyn Larouchelow 4M900003942000---0.046--2.305%
2016-12-24T20:28:42Jocelyn Larouchelow 4M108000108000---0.016--0.695%
2016-12-30T22:58:48Jocelyn Larouchelow 4M129600129600---0.020--0.775%
2017-01-30T01:30:57Jocelyn Larouchelow 4M167520167520---0.026--0.898%
2017-02-13T00:36:33Jocelyn Larouchelow 4M24122824122806---0.055--2.479%
2020-10-08T01:38:43axnManual testing3000000060000000012---9.298--10.378%
2022-03-04T04:18:57Jocelyn LaroucheManual testing9000090000---0.014--0.621%
2022-03-22T11:10:14Jocelyn LaroucheManual testing100000100000---0.015--0.663%
2022-05-25T14:13:20Jocelyn LaroucheManual testing100000130364850---1.096--4.365%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:29:36Mark RoseManual testing21260--0.042--
2009-03-09T16:56:00S485122USB-Z260261--0.042--
2011-06-11T14:37:00Grant McCrackenthumper261262--0.084--
2012-06-05T02:31:00GrunwalderGIMPManual testing21263--0.435--
2016-02-23T16:29:36Mark RoseManual testing262263--0.268--
2015-01-23T13:18:00VictordeHollanderManual testing263264--0.536--
2015-01-23T13:18:00VictordeHollanderManual testing264265--1.019--
2015-10-19T08:19:14ramgeisManual testing265266--2.038--
2017-01-03T07:36:03Gordon SpenceManual testing266267--4.076--
2018-11-26T14:19:27TJAOIManual testing267268--8.153--
2020-11-11T05:42:25axnManual testing268269--16.31--
2021-02-23T10:51:20axnManual testing269270--32.61--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.959 GHz-days
Estimated T-Level:0.650
DigitsB1CurvesCompleteFacMiss
201100013 / 1000.13087.752%
255000013 / 2800.04695.455%

New Calculation Method

Total ECM effort:1.959 GHz-days
Estimated T-Level:0.650
DigitsB1CompleteFacMiss
20110000.50360.459%
25500000.04795.450%
302500000.00399.707%


ECM Summary

B1B2factorcurvesGHz-days
500005000000121.785
50000680000010.173


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-11-17T00:00:00ANONYMOUSv4_computers3DB5795F087D99__0.385


PRP results:
dateuseridcompidcofactorsres64PRP
2021-07-01T00:07:34tottenhoff2018pc
27128564212677881199959
0CD52BF383E4980Cno


P-1 factor-bounds graph:
B1 = 30000000, B2 = 600000000 (P-1 stage 2)
B1 = 30000000 (P-1 stage 1)
B1 = 100000, B2 = 130364850 (P-1 stage 2)
B1 = 241228, B2 = 2412280 (P-1 stage 2)
B1 = 90000, B2 = 3942000 (P-1 stage 2)
B1 = 90000, B2 = 3285000 (P-1 stage 2)
B1 = 241228 (P-1 stage 1)
B1 = 90000, B2 = 1642500 (P-1 stage 2)
B1 = 167520 (P-1 stage 1)
B1 = 129600 (P-1 stage 1)
B1 = 108000 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
B1 = 90000 (P-1 stage 1)
B1 = 20000, B2 = 260000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-05-25T14:13:20+00:00