David Underbakke's TwinGen

A titan, as defined by Samuel Yates, is anyone who has found a titanic prime. This page provides data on those that have found these primes. The data below only reflects on the primes currently on the list. (Many of the terms that are used here are explained on another page.)

Proof-code(s):

E-mail address:

david9

(at)

underbakke

(dot)

com

Web page:

http://www.underbakke.com/primes

Username:

TwinGen

(entry created on 01/03/03)

Database id:

440

(entry last modified on 07/31/21)

Program Does *:

sieve

Active primes:

on current list: 35, rank by number 18

Total primes:

number ever on any list: 6939

Production score:

for current list 47 (normalized: 14), total 51.8939, rank by score 25

Largest prime:

28401 · 2^2097152 + 1 ‏(‎631311 digits) via code L4547 on 02/14/17

Most recent:

4931286045 · 2¹⁵²⁸⁵⁰ - 1 ‏(‎46023 digits) via code L5389 on 07/31/21

Entrance Rank:

mean 20484.60 (minimum 885, maximum 57374)

Descriptive Data: (report abuse)

TwinGen is a program to rapidly presieve a set of candidates of the form k^.2ⁿ+/-1 and remove those candidates which are composite.

TwinGenX is a new 64 bit specialized sieve with many new features and speed improvements including multiple n range, multiple core support, multiple concurrent math modes, and multiple density sieves.

It can be found at http://www.underbakke.com/primes

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Surname: TwinGen (used for alphabetizing and in codes)
Unverified primes are omitted from counts and lists until verification completed.

I administer David Underbakke's TwinGen and I would like to