Cipher Challenge
Franklin's Cipher to Dumas
Introduction
Benjamin Franklin sent this enciphered passage to the American diplomat Charles W. F. Dumas on 16 August 1781. The surrounding clear words have been omitted, leaving the 69 transmitted number groups. Federal historical edition
1
14 5 3 10 28 2 76 202 66 11 12 273 50 14 76 5 42 45 16 15 424 235 19 20 69
26
580 11 150 27 56 35 104 652 28 675 85 79 50 63 44 22 219 17 60 29 147 136 41 202 55
51
580 10 227 613 176 373 309 4 108 40 19 97 309 17 35 90 201 100 677