is 2 1665973 - 1
has 501508 decimal digits
takes 0.078 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LAC37B8A64DF7B56Cdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26717.835868.6567%500000150000000.08805.0115%17.923870.2275%1.5708%
PrimeNet2570.011563.1579%70001200000.00092.5683%0.012464.1041%0.9462%
GPU722610.184465.5738%7000800000.00071.2061%0.185165.9890%0.4152%
Difference+6+17.6514+3.0829%+493000+14920000+0.0873+3.8054%+17.7387+4.2385%+4.2385%

Known prime factors (1 factor, 62.7 bits, 0.00376622% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
166597377248451847704110391962.7442318418481203
32 × 11 × 40013 × 585269
2008-05-29400135852690.41510.00480.0056

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-17T19:18:07alpertronManual testing5000001500000012-
skipped known factor: 7724845184770411039
--0.088--5.012%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-11-14T00:00:00ANONYMOUSv4_computers21257--0.012--


ECM factoring results:

Old Calculation Method

Total ECM effort:14.710 GHz-days
Estimated T-Level:24.429
DigitsB1CurvesCompleteFacMiss
2011000248 / 1002.4808.270%
2550000248 / 2800.88641.177%

New Calculation Method

Total ECM effort:14.710 GHz-days
Estimated T-Level:24.429
DigitsB1CompleteFacMiss
20110009.5380.007%
25500000.88341.372%
302500000.05694.585%
3510000000.00399.740%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50000500000024814.71


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-11-21T00:00:00ANONYMOUSv4_computersAC37B8A64DF7B56C0.078


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-02T21:45:39Oliver KruseGTX-1
7724845184770411039
29DDA9AAB87ABA__no
2017-11-10T20:57:47kkmrkkblmbrbkc4.xlarge
7724845184770411039
29DDA9AAB87ABA__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
257
250
260
270
280
290
2100
Last modified: 2019-12-23T11:27:00+00:00