is 2 3754099 - 1
has 1130097 decimal digits
takes 0.394 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LD445E4E029BFE209double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2677.915167.1642%2000001303648501.11056.8113%9.025569.4007%2.2365%
PrimeNet2600.040963.3333%160003200000.00503.0914%0.045964.4669%1.1335%
GPU722640.948165.6250%220004500000.00692.1111%0.955066.3507%0.7257%
Difference+3+6.9669+1.5392%+178000+129914850+1.1036+4.7002%+8.0705+3.0500%+3.0500%

Known prime factors (1 factor, 72.1 bits, 0.00191961% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
375409949366983996402716918632272.064657507753476969
293 × 185063 × 12125891
2009-09-0618506312125891454.880.12730.1879

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-07-07T17:50:00Carsten Kossendeyleela20000265000---0.005--1.150%
2022-05-25T14:13:49Jocelyn LaroucheManual testing200000130364850-
skipped known factor: 4936698399640271691863
--1.110--6.811%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2009-03-04T08:03:00S485122USB-Z260261--0.041--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.000 GHz-days
DigitsB1CurvesCompleteFacMiss

New Calculation Method

Total ECM effort:0.000 GHz-days
DigitsB1CompleteFacMiss


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-07-30T00:00:00LEE Sau Danv4_computersD445E4E029BFE2090.394


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-20T19:28:12kkmrkkblmbrbkManual testing
4936698399640271691863
14C76620A1830B__no
2017-12-04T23:09:12Oliver KruseGTX-3
4936698399640271691863
14C76620A1830B__no


P-1 factor-bounds graph:
B1 = 200000, B2 = 130364850 (P-1 stage 2)
B1 = 200000 (P-1 stage 1)
B1 = 20000, B2 = 265000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
108
109
TF factor-bounds graph:
267
261
250
260
270
280
290
2100
Last modified: 2022-05-25T14:13:49+00:00