is 2 17747 - 1
has 5343 decimal digits
takes 0.000 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-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2671,674.306577.6119%4000000004000000000.17067.9933%1,674.477179.4015%
Target2440.000165.9091%500100000.00001.5045%0.000166.4220%
Difference+23+1,674.3064+11.7028%+399999500+399990000+0.1706+6.4888%+1,674.4770+12.9795%

Known prime factors (5 factors, 263.7 bits, 1.48586823% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
177471739207720.73049
72
-49497.955e-122.090e-84.254e-8
177475111137722.285144
24 × 32
2008-08-26993.247e-113.839e-97.813e-9
1774733115903824.981933
3 × 311
2008-08-2633111.514e-108.437e-91.368e-8
17747839167295802784088693718472686.1172364251129212779874609
17 × 47 × 509087 × 5812390961393
2014-09-0450908758123909613931.443e+9135.08252.28
1774797266550108959221636507551287021733109.58427403659804180769041671141964
22 × 3 × 11 × 79 × 15559 × 827063 × 204214827442589
2017-11-178270632042148274425891.002e+134,745.88,863.8

26 Composite Factors:
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2021-08-27Seth_TrManual testing400000000400000000-
skipped known factor: 1739207
skipped known factor: 5111137
skipped known factor: 33115903
--0.171--7.993%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-08-26ANONYMOUSManual testing??24.98182.54330e-110.0006.96316e-10
2008-08-26ANONYMOUSManual testing??22.28579.81339e-130.0002.68675e-11


ECM factoring results:
Total ECM effort:22.183 GHz-days
Estimated T-Level:36.243
DigitsB1CompleteFacMiss
2011000423.1030.000%
255000091.0280.000%
3025000015.3890.000%
3510000002.13611.811%
4030000000.24977.986%
45110000000.02597.510%
50440000000.00299.775%


ECM Summary

B1B2factorcurvesGHz-days
500005000000680.021
250000250000003340.513
250000250000001330.204
10000001000000001,0626.518
10000001000000003892.388
300000030000000068112.54


Lucas-Lehmer results:
No L-L results for M17747


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-21Oliver KrusePRP
1739207
5111137
33115903
83916729580278408869371847
DC3B703751DD041Eno
2017-09-21Oliver KruseManual testing
1739207
5111137
33115903
83916729580278408869371847
DC3B703751DD041Eno
2017-10-02kkmrkkblmbrbkManual testing
1739207
5111137
33115903
83916729580278408869371847
DC3B703751DD04__no
2017-11-17Robin89
1739207
no
2017-11-17Robin89
1739207
5111137
no
2017-11-17Robin89?
2017-11-17kkmrkkblmbrbkc4.xlarge
1739207
5111137
33115903
83916729580278408869371847
972665501089592216365075512870217
4F86CBD9F60F8F__no
2017-11-18Oliver KruseThreadripper
1739207
5111137
33115903
83916729580278408869371847
972665501089592216365075512870217
4F86CBD9F60F8F__no


P-1 factor-bounds graph:
B1 = 400000000 (P-1 stage 1)
100
101
102
103
104
105
106
107
108
109
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
1013
1014
1015
TF factor-bounds graph:
2
this exponent TF target: 44
TF double-checked to: 67.7
ECM T-Level=36.24 ~= 104-bit
250
260
270
280
290
2100
2110
Last modified: 2023-03-23T17:39:31+00:00