Numdle

One number in a billion per day, cracked into its primes. Read as Unix time, it is also a moment between 1970 and 2001.

What is Numdle?

Numdle rolls one number from 1 to 999,999,999 a day, every one as likely as the next, and cracks it into its prime factors. Read as Unix time, it's also a moment between 1970 and 2001. It's pure luck with no reroll: primes, squares, palindromes and famous numbers earn badges worth EP.

Numdle is one of 13 daily luck games on ohmyrng. Everyone gets Hexdle, Georoll, Wikidle and Giftroll every day, and each player's dice deal three more from the rest: on a day yours deal Numdle, it's yours to roll.

The rarest numbers

• Repdigit: Every digit the same, a lone digit included. 1 in 12,345,679
• Kaprekar: Split its square anywhere into two parts, the right one not zero, and they add back up to it (1 counts too). 1 in 9,803,922
• Ones and Zeros: Only 0s and 1s. 1 in 1,956,947
• Taxicab: A sum of two cubes in two ways, like 1729. 1 in 643,501
• Palindromic Prime: A prime that reads the same backwards. 1 in 167,983

All 105 Numdle badges and their odds

Questions

How does Numdle pick a number?

The server picks a whole number from 1 to 999,999,999 with a secure random number generator, then splits it into primes. You get one roll per UTC day, and nothing you do can steer it.

Can I roll again?

No. One roll a day, and fresh dice at 00:00 UTC: Numdle comes back on a day they deal it.

Do I need an account?

No, anyone can roll. An account keeps your badges and streak, and puts you on the boards.

How often is the number prime?

A prime, or 1, comes up 1 in 20: the Atom badge. A twin prime, a palindromic prime and other kinds pay more.