On Thursday, March 12th (21:21:41 GMT), the 60 millionth griddler was solved by Maryvic. The solved puzzle was part of the Flintstones multi (ID: 76502).

Almost made it:
ladowe who solved the 59,999,999th puzzle and mirojarabina who solved the 60,000,001st puzzle.

The former records are:
The 60 millionth puzzle was solved on March 12th, 2009, by Maryvic
The 59 millionth puzzle was solved on February 22nd, 2009, by Dutchgirl
The 58 millionth puzzle was solved on February 2nd, 2009, by eurinsa
The 57 millionth puzzle was solved on January 15th, 2009, by labizittinmi
The 56 millionth puzzle was solved on December 25th, 2008, by fialia

The 55 millionth puzzle was solved on December 4th, 2008, by lilmissdior
The 54 millionth puzzle was solved on November 15th, 2008, by Magdika
The 53 millionth puzzle was solved on October 27th, 2008, by ArminGips
The 52 millionth puzzle was solved on October 8th, 2008, by Feldryn
The 51 millionth puzzle was solved on September 17th, 2008, by bertuswaggel

The 50 millionth puzzle was solved on August 28th, 2008, by Lies109
The 49 millionth puzzle was solved on August 7th, 2008, by minniina
The 48 millionth puzzle was solved on July 18th, 2008, by jovr
The 47 millionth puzzle was solved on June 28th, 2008, by shoshiadi
The 46 millionth puzzle was solved on June 7th, 2008, by damumu

The 45 millionth puzzle was solved on May 16th, 2008, by BADkitty
The 44 millionth puzzle was solved on April 26th, 2008, by so_bored12
The 43 millionth puzzle was solved on April 7th, 2008, by catarinalund
The 42 millionth puzzle was solved on March 19th, 2008, by simone19704
The 41 millionth puzzle was solved on February 29th, 2008, by aminea

The 40 millionth puzzle was solved on February 9th, 2008, by cerbe
The 39 millionth puzzle was solved on January 20th, 2008, by Georgia75
The 38 millionth puzzle was solved on December 30th, 2007, by rogerd66
The 37 millionth puzzle was solved on December 5th, 2007, by jankadz
The 36 millionth puzzle was solved on November 13th, 2007, by affinia

The 35 millionth puzzle was solved on October 23rd, 2007, by sar-tsa
The 34 millionth puzzle was solved on September 30th, 2007, by tonnylaanplat
The 33 millionth puzzle was solved on September 7th, 2007, by CrazyBliep
The 32 millionth puzzle was solved on August 15th, 2007, by Yemilka
The 31 millionth puzzle was solved on July 22nd, 2007, by ay_cim

The 30 millionth puzzle was solved on June 27th, 2007, by mgckmdn
The 29 millionth puzzle was solved on June 7th, 2007, by yoannaa
The 28 millionth puzzle was solved on May 16th, 2007, by wau
The 27 millionth puzzle was solved on April 22nd, 2007, by hell28k
The 26 millionth puzzle was solved on March 28th, 2007, by martusia136

The 25 millionth puzzle was solved on March 3rd, 2007, by laxrunners
The 24 millionth puzzle was solved on February 2nd, 2007, by parsky
The 23 millionth puzzle was solved on January 5th, 2007, by cherrypez
The 22 millionth puzzle was solved on December 5th, 2006, by titimatt
The 21 millionth puzzle was solved on November 6th, 2006, by atandjmc

The 20 millionth puzzle was solved on October 7th, 2006, by trombonetom
The 19 millionth puzzle was solved on September 5th, 2006, by asaf_r_
The 18 millionth puzzle was solved on August 5th, 2006, by zelvaB
The 17 millionth puzzle was solved on July 5th, 2006, by anbaevent
The 16 millionth puzzle was solved on June 5th, 2006, by Adar

The 15 millionth puzzle was solved on May 5th, 2006, by Melu
The 14 millionth puzzle was solved on April 1st, 2006, by Lies109
The 13 millionth puzzle was solved on February 28th, 2006, by delsol
The 12 millionth puzzle was solved on January 24th, 2006, by martek1987
The 11 millionth puzzle was solved on December 15th, 2005, by Tunrida

The 10 millionth puzzle was solved on November 4th, 2005, by BESNAG1
The 9 millionth puzzle was solved on September 18th, 2005, by jmsriv
The 8 millionth puzzle was solved on August 2nd, 2005, by hickhack
The 7 millionth puzzle was solved on June 12th, 2005, by lmgoodall
The 6 millionth puzzle was solved on April 19th, 2005, by lironpaz

The 5 millionth puzzle was solved on February 23rd, 2005, by myran
The 4 millionth puzzle was solved on December 16th, 2004, by FlyingDuck
The 3 millionth puzzle was solved on September 29th, 2004, by khaos
The 2 millionth puzzle was solved on June 3rd, 2004, by calle
The 1 millionth puzzle was solved on January 12th, 2004, by drworm01