is 2 1939363 - 1
has 583807 decimal digits
takes 0.105 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LC0AB57B72B4C5401double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26715.321568.6567%500000150000000.10155.1041%15.423070.2565%1.5998%
PrimeNet2580.019863.7931%80001400000.00122.4641%0.021064.6853%0.8922%
GPU722620.316866.1290%8000900000.00101.1518%0.317866.5191%0.3901%
Difference+5+15.0047+2.5277%+492000+14910000+0.1005+3.9524%+15.1052+3.7374%+3.7374%

Known prime factors (1 factor, 65.6 bits, 0.00338235% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1939363557679513148048732792065.59614377904320853
53 × 74903 × 3621767
2008-11-147490336217675.10720.02110.0290

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:41:40alpertronManual testing5000001500000012-
skipped known factor: 55767951314804873279
--0.101--5.104%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-12-21T00:00:00ANONYMOUSv4_computers21258--0.020--


ECM factoring results:

Old Calculation Method

Total ECM effort:19.191 GHz-days
Estimated T-Level:24.429
DigitsB1CurvesCompleteFacMiss
2011000248 / 1002.4808.270%
2550000248 / 2800.88641.177%

New Calculation Method

Total ECM effort:19.191 GHz-days
Estimated T-Level:24.429
DigitsB1CompleteFacMiss
20110008.4830.021%
25500000.76946.358%
302500000.04895.355%
3510000000.00299.781%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
500005000000312.155
50000660000021016.48
50000675000070.555


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-02T00:00:00ANONYMOUSv4_computersC0AB57B72B4C54010.105


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-05T02:36:19Oliver KruseGTX-0
55767951314804873279
A1B4F5B3D5DEC9__no
2017-11-15T10:44:40kkmrkkblmbrbkc4.xlarge
55767951314804873279
A1B4F5B3D5DEC9__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
108
TF factor-bounds graph:
267
258
250
260
270
280
290
2100
Last modified: 2022-03-10T10:41:58+00:00