is 2 1723247 - 1
has 518750 decimal digits
takes 0.081 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26717.243068.6567%500000150000000.08805.0320%17.331070.2339%1.5772%
PrimeNet2570.011163.1579%80001400000.00102.7943%0.012264.1874%1.0295%
GPU722610.178365.5738%70001100000.00091.3442%0.179166.0365%0.4628%
Difference+6+17.0647+3.0829%+493000+14890000+0.0872+3.6878%+17.1519+4.1974%+4.1974%

Known prime factors (3 factors, 169.9 bits, 0.00986056% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
172324714923319031030.475433
433
-14339.079e-111.674e-63.029e-6
1723247123273076117810230792063.4183576767466237
3 × 72 × 1009 × 24114719
2017-02-141009241147191.22140.08970.1675
1723247770634952482193939442872376.02822359967911802369
19 × 1310137 × 898257523
2019-06-02131013789825752313,4733.42426.2376

4 Composite Factors:
exponentprime factorscomposite factordigitsbits*
1723247183964344271555593907709893372993.893
172324711500431251560670552638449468816133106.503
172324794998541156382563750448262539423798719967342139.447
172324714176935370612821195772527273850193006725776490677
19
52169.922
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:31:24alpertronManual testing5000001500000012-
skipped known factor: 1492331903
--0.088--5.032%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2017-02-14T17:30:51TJAOIManual testing263264*63.418200.2950.1650.600


ECM factoring results:

Old Calculation Method

Total ECM effort:15.120 GHz-days
Estimated T-Level:24.536
DigitsB1CurvesCompleteFacMiss
2011000254 / 1002.5407.786%
2550000254 / 2800.90740.302%

New Calculation Method

Total ECM effort:15.120 GHz-days
Estimated T-Level:24.536
DigitsB1CompleteFacMiss
20110008.1940.028%
25500000.74147.686%
302500000.04695.542%
3510000000.00299.791%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025114.94
50000500000030.179


Lucas-Lehmer results:
No L-L results for M1723247


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-03T04:20:05Oliver KruseGTX-2
1492331903
12327307611781023079
31DC58F087E8F3__no
2017-11-03T15:48:51kkmrkkblmbrbkc4.xlarge
1492331903
12327307611781023079
31DC58F087E8F3__no
2019-06-03T16:05:19Niels_Mache_NextcloudSuperDry-X
1492331903
12327307611781023079
77063495248219393944287
1C69BD238A42A21Dno
2019-06-04T15:33:31kkmrkkblmbrbkc5.large
1492331903
12327307611781023079
77063495248219393944287
1C69BD238A42A21Dno


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
100
101
102
103
104
105
106
107
100
101
102
103
104
105
106
107
108
109
TF factor-bounds graph:
267
264
230
240
250
260
270
280
290
2100
Last modified: 2020-04-27T10:16:20+00:00