T.H.E E.T.E.R.N.A.L L.O.O.P is a number discovered by Akuratchium, it appears in the Akuratchium series at the beginning of part 13 and at the end of part 12
it is equivalent to U̷̫̿̍̀̓́̕N̶̰̜̈́̆̈́́͝K̶̡̞̖̜͇̹̰͖̗͑̒̈́̃́̅̍͘͘͠N̸̰̩̞̰̬͓͉͒̆̓̏̅̕̚͜ͅO̵̧̡̢̭͙̦͕̗̦̒̊́̀̈͛͝͝ͅW̸̧̧͖̰̥͈̌̋̇͂͘͘N̵̡̛̟̘̥͍̟̬̂̃͗̏ ̶̧̨͔̼̣͍̱̐́͜ͅT̵̛̼̦͍͐̒͐̏̌͝Ŗ̵̻͚̠͇̎̊̋́̓̓͗͆ͅU̸̪̒̏̕Ë̸̛͚̬́̃̐̅̀͠͠ ̵͔̘͎̺͈̥̪̎͌̄̀̑R̷̠̤̯̰͙̭̱̜̳͌́͑̈̇̾͛̿̚É̸̛͇̞̼̙̰̦̜̈́̃͊̃̏͑͠A̷̗̍̔͆͛̀͊͐L̴̖̖̻͚̽̆̐̌̐͘ ̸͉͓͓͓̲̭̻̔̓͛̈́́̿͒̕͝F̵̛̠̗̻͎̱̩̦̭̓̓͂͐̇͐͊̚͝I̸̤̗̒̿̿̈́͗͆͠͝N̴̢̛̝̳̬̆̔̽͐̈͆͗̂A̸̺̦̓͂̃̍̓́̀̐͐L̸̛̜͚̠̟̘̹̙͍͚̥͒̃͊̾̈̓́ ̶̼̜͎̒͌̿̊̄̄̈́͋̀͘E̷̳̯̊ͅN̷̛͉͙͕̥̹̮̈́̊͛̿̀́̆̌̈́D̸̲͓̲̞͈͚̜̼̠̎̓̌̚͜͝ in numbers 0 to ???[3]