is 2 1774757 - 1
has 534256 decimal digits
takes 0.096 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
Actual26716.742568.6567%500000150000000.10155.0499%16.844070.2395%1.5828%
PrimeNet2570.010863.1579%80001400000.00122.8099%0.012064.1931%1.0352%
GPU722610.173165.5738%80001200000.00111.4552%0.174266.0747%0.5010%
Difference+6+16.5694+3.0829%+492000+14880000+0.1004+3.5947%+16.6698+4.1648%+4.1648%

Known prime factors (3 factors, 174.3 bits, 0.00981837% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1774757181167194571134.0775104
24 × 11 × 29
-16291.425e-91.314e-62.561e-6
17747574033617804370941598812168.451113638594026420
22 × 32 × 5 × 757 × 833983517
2020-09-0975783398351737.5223.57436.6757
177475739027680542552730831212271.7251099521808973080
23 × 5 × 19 × 137 × 56543 × 186763
2015-06-1156543186763527.190.00500.0091

4 Composite Factors:
exponentprime factorscomposite factordigitsbits*
1774757730759221585486573085718150461731102.527
17747577070535394468453750982659898529732105.802
1774757157422747099742064907888813076100617646860143140.176
177475728519837453562873869981061726484280814125879286269
657
53174.252
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2015-06-11T21:50:00alpertronManual testing50000015000000122271.7250.0390.1930.0795.050%


Trial Factoring results:
No TF results for M1774757


ECM factoring results:

Old Calculation Method

Total ECM effort:17.484 GHz-days
Estimated T-Level:24.536
DigitsB1CurvesCompleteFacMiss
2011000254 / 1002.5407.786%
2550000254 / 2800.90740.302%

New Calculation Method

Total ECM effort:17.484 GHz-days
Estimated T-Level:24.536
DigitsB1CompleteFacMiss
20110008.1940.028%
25500000.74147.686%
302500000.04695.542%
3510000000.00299.791%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025117.28
50000500000030.207


Lucas-Lehmer results:
No L-L results for M1774757


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T15:24:38alpertronManual testing
18116719457
3902768054255273083121
B3CCD3FA40DBE0__no
2017-10-19T17:13:13Oliver KruseThreadripper
18116719457
3902768054255273083121
B3CCD3FA40DBE0__no
2020-09-11T07:59:23Klaus Nordmannno1
18116719457
403361780437094159881
3902768054255273083121
EC2EA7E3B5637F__no
2020-11-11T15:45:40Oliver KruseIOS-5
18116719457
403361780437094159881
3902768054255273083121
EC2EA7E3B5637FEEno


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
100
101
102
103
104
105
106
107
108
109
TF factor-bounds graph:
267
230
240
250
260
270
280
290
2100
Last modified: 2020-11-11T15:45:40+00:00