Congratulations to you , Dirk !

.....

Norman

Auch wenn ich leider nie eine Antwort bekommen habe !

--- Dirk Augustin <

dirk.augustin@...> schrieb am Di, 1.7.2008:

Von: Dirk Augustin <

dirk.augustin@...>

Betreff: [primeform] New Record for 7 simultaneous primes

An:

primeform@yahoogroups.com
Datum: Dienstag, 1. Juli 2008, 21:10

Hello Group!

After sieving through roughly 1.5 trillion candidates between 281 and

302 digits and about 150 million prp tests I discovered yesterday a

new record Cunninham chain of length 7 which is also a new record for

7 simultaneous primes:

1178137903623* 2^0*661#- 1, 291 digits,

1178137903623* 2^1*661#- 1, 291 digits,

1178137903623* 2^2*661#- 1, 291 digits,

1178137903623* 2^3*661#- 1, 292 digits,

1178137903623* 2^4*661#- 1, 292 digits,

1178137903623* 2^5*661#- 1, 292 digits,

1178137903623* 2^6*661#- 1, 292 digits.

It improves the CC7 record by 40 digits and the record for 7

simultaneous primes by 10 digits.

Sieving was done with NewPGen, prp and prime testing with pfgw.

Regards,

Dirk Augustin

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