is 2 3375149 - 1
has 1016022 decimal digits
takes 0.354 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L7D4728DED1BA6955double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26817.659967.6471%40000001500000001.82068.8051%19.480570.4958%2.8487%
PrimeNet2600.045563.3333%140002800000.00432.8435%0.049864.3759%1.0426%
GPU722641.054665.6250%180003200000.00521.7896%1.059866.2402%0.6152%
Difference+4+16.6054+2.0221%+3982000+149680000+1.8153+7.0155%+18.4207+4.2556%+4.2556%

Known prime factors (1 factor, 97.6 bits, 0.00289180% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
33751492406270907207762462141542066013097.60335646884140637383151700
22 × 3 × 52 × 17 × 251 × 3181 × 1633561 × 5358937
2021-03-08163356153589371.840e+100.27970.5063

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-07-09T04:56:00Carsten Kossendeydurandal15000206250---0.004--0.810%
2011-10-18T10:55:00harleeP4_260060000930000---0.016--1.880%
2014-06-24T22:45:00Jocelyn LaroucheManual testing7901779017---0.012--0.755%
2014-10-12T23:58:00Jocelyn LaroucheManual testing9803498034---0.015--0.860%
2015-08-07T02:08:00Squeeky_SquirrelP4_26001650004331250---0.060--3.301%
2017-04-13T02:08:49Jocelyn Larouchelow 4M33000033000006---0.075--3.427%
2021-03-08T23:43:29mikrMSI4000000150000000123097.6031.8210.7093.6418.805%
2022-02-25T17:22:07Jocelyn LaroucheManual testing200000200000---0.030--1.269%
2022-04-09T09:24:07Jocelyn LaroucheManual testing10000001000000---0.152--2.569%
2022-04-10T15:21:18Jocelyn LaroucheManual testing1000000119126238---1.132--7.542%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:29:27Mark RoseManual testing21260--0.046--
2009-03-28T08:08:00S485122USB-Z260261--0.046--
2011-08-16T04:06:00markroldgamer261262--0.091--
2012-11-15T00:22:00GrunwalderGIMPManual testing21263--0.473--
2016-02-23T16:29:27Mark RoseManual testing262263--0.291--
2015-02-15T12:50:00VictordeHollanderManual testing263264--0.582--
2015-02-15T12:50:00VictordeHollanderManual testing264265--1.107--
2015-03-31T11:39:00Gordon SpenceManual testing265266--2.214--
2017-03-08T15:55:31Gordon SpenceManual testing266267--4.428--
2018-10-29T15:18:22TJAOIManual testing267268--8.856--


ECM factoring results:

Old Calculation Method

Total ECM effort:3.220 GHz-days
Estimated T-Level:1.100
DigitsB1CurvesCompleteFacMiss
201100022 / 1000.22080.163%
255000022 / 2800.07992.431%

New Calculation Method

Total ECM effort:3.220 GHz-days
Estimated T-Level:1.100
DigitsB1CompleteFacMiss
20110000.71049.180%
25500000.06493.787%
302500000.00499.606%


ECM Summary

B1B2factorcurvesGHz-days
500005000000223.220


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-07-04T00:00:00ANONYMOUSv4_computers7D4728DED1BA69550.354


PRP results:
dateuseridcompidcofactorsres64PRP
2021-03-09T07:58:27MarkSdesktop-i7
240627090720776246214154206601
89AD546788A057E2no
2021-03-09T13:34:06_p95holder_TFL16_PRPt11-E_b
240627090720776246214154206601
89AD546788A057E2no


P-1 factor-bounds graph:
B1 = 4000000, B2 = 150000000 (P-1 stage 2)
B1 = 1000000, B2 = 119126238 (P-1 stage 2)
B1 = 4000000 (P-1 stage 1)
B1 = 1000000 (P-1 stage 1)
B1 = 330000, B2 = 3300000 (P-1 stage 2)
B1 = 165000, B2 = 4331250 (P-1 stage 2)
B1 = 330000 (P-1 stage 1)
B1 = 200000 (P-1 stage 1)
B1 = 165000 (P-1 stage 1)
B1 = 60000, B2 = 930000 (P-1 stage 2)
B1 = 98034 (P-1 stage 1)
B1 = 79017 (P-1 stage 1)
B1 = 60000 (P-1 stage 1)
B1 = 15000, B2 = 206250 (P-1 stage 2)
B1 = 15000 (P-1 stage 1)
103
104
105
106
107
103
104
105
106
107
108
109
TF factor-bounds graph:
268
267
266
265
264
263
262
261
260
250
260
270
280
290
2100
Last modified: 2022-04-10T15:21:18+00:00