This is a mobile friendly puzzle:

Unless pure nuns use pulse 
917    655  1901 104 614

=> Calculate NULL

  • 1
    $\begingroup$ I even created this puzzle completely on my smartphone :) $\endgroup$
    – Lezzup
    Jul 17, 2023 at 18:23
  • $\begingroup$ Are there rot13(fhccbfrq gb or cnggreaf orgjrra gur jbeqf, be vf guvf shapgvba cheryl qrcraqrag ba gur jbeqf gurzfryirf? Orpnhfr V tbg gur vzcerffvba gung gur jbeqf pbhyq pbeerfcbaq gb n pelcgvp pyhr)... $\endgroup$ Jul 17, 2023 at 19:24
  • $\begingroup$ @newQOpenWid, there is no cryptic clue. Just thought it would be nicer to put the words in a sentence. $\endgroup$
    – Lezzup
    Jul 18, 2023 at 8:20
  • $\begingroup$ Been a while, but is this related to conversions between bases? I tried converting between base 10 and base 7 and back, but I didn't get any progress... $\endgroup$ Jul 20, 2023 at 22:35
  • $\begingroup$ not at all, it is something completely different. $\endgroup$
    – Lezzup
    Jul 20, 2023 at 22:54

1 Answer 1


This is

a cipher for Roman numerals: selrupn = IVXLCDM.

unless pure nuns use pulse
917 655 1901 104 614
So null = MCXX = 1120.


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