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2021-09-21, 14:53
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#980 |
Sep 2011
Germany
311710 Posts |
26*578^199886-1 found by [AF>Belgique] melektha (552073 digits)
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2021-09-22, 21:07
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#981 |
Dec 2011
After milion nines:)
27528 Posts |
Why many old CRUS primes are again on Top 5000 page?
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2021-09-22, 22:19
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#982 | |
May 2007
Kansas; USA
1070210 Posts |
Quote:
Reason: They were changed to an Anonymous person. Last fiddled with by gd_barnes on 2021-09-22 at 22:24 |
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2021-09-22, 23:33
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#983 | |
"AMD YES!"
Jan 2020
Bellevue, WA
2×3×13 Posts |
Quote:
Why? |
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2021-09-23, 06:51
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#984 | |
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May 2007
Kansas; USA
2×5,351 Posts |
Quote:
The "anonymous" person does not compete with other individuals for top-5000 prime score. It is just ignored for person scoring purposes. This is standard procedure for large projects who have many people who don't want to mess with reporting primes to the top-5000 site. Both PrimeGrid and RPS have proof codes for anonymous individuals and have used them extensively. This is the first time that CRUS has had one. |
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2021-09-24, 10:09
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#985 |
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May 2007
Kansas; USA
2×5,351 Posts |
279*798^235749-1 is prime!
R798 is now a 3k'er. 
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2021-09-25, 18:15
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#986 |
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Sep 2011
Germany
3·1,039 Posts |
38*977^299737+1 found by whizbang (896184 digits)
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2021-09-28, 14:48
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#987 |
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Sep 2011
Germany
60558 Posts |
162*814^233173+1 found by whizbang (678682 digits)
196*814^263256+1 found by grcpool.com-3 (766242 digits) |
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2021-10-01, 12:27
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#988 |
"Mark"
Apr 2003
Between here and the
658910 Posts |
64*425^467857-1 is prime. This prime clocks in at 1229712 digits and proves R425. Woohoo!!!
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2021-10-01, 19:27
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#989 | |
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May 2007
Kansas; USA
2×5,351 Posts |
Quote:
A big congrats on a huge prime and proof!  
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2021-10-01, 20:11
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#990 | |
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"Mark"
Apr 2003
Between here and the
19BD16 Posts |
Quote:
Base factorized as : 5^2*17 Base prime factor(s) taken : 5, 17 Starting N+1 prime test of 64*425^467857-1 Using FMA3 FFT length 448K, Pass1=448, Pass2=1K, clm=4, a = 3 64*425^467857-1 may be prime. Starting Lucas sequence... Using FMA3 FFT length 448K, Pass1=448, Pass2=1K, clm=4, P = 4 64*425^467857-1 may be prime, trying to compute gcd's U((N+1)/17) is coprime to N! U((N+1)/5) is coprime to N! 64*425^467857-1 is prime! (1229712 decimal digits, P = 4) Time : 108946.064 sec. This is compared to a PRP test for the previous candidate on the same CPU: 64*425^467761-1 is not prime. RES64: AF05EBF82647AB5A. OLD64: 4C8B49ECEACF6D8D Time : 16277.097 sec. |
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