At you can search the first 1,500,000 decimal digits of Pi, converted into base 27 and assigned to the letters A through Z (no space, though). The string 'GODISMATHEMATICS' does not appear in the first million digits of Pi-base-27, but 'GOD' appears 46 times, the first time at position 29639.

You can also find numeric strings of digits in the first 50 million decimal places of Pi at