Note 2023 is the last year that I will maintain this site--there is currently no plan to continue it after that.

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 1/3/2003 21:42:10 CDT)

Database id:

440

(entry last modified on 7/31/2021 05:11:46 CDT)

Program Does *:

sieve

Active primes:

on current list: 28, rank by number 20

Total primes:

number ever on any list: 6941

Production score:

for current list 46 (normalized: 6), total 51.8945, rank by score 28

Largest prime:

28401 · 2^2097152 + 1 ‏(‎631311 digits) via code L4547 on 2/14/2017 10:18:44 CDT

Most recent:

5606879602425 · 2^1290000 - 1 ‏(‎388342 digits) via code L3573 on 9/24/2021 01:37:08 CDT

Entrance Rank:

mean 23133.11 (minimum 885, maximum 57375)

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

Error in data above: HTML_Tidy reports: line 9 column 59 - Warning: inserting implicit <p> line 7 column 1 - Warning: trimming empty <p> line 9 column 59 - Warning: trimming empty <p>

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