Consider the letters in the words "HALF LIFE THREE" and the usual conversion table:

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26

Write the letters on 3 columns:

H A L = 8 01 12 = 80112 F L I = 6 12 09 = 61209 F E T = 6 05 20 = 60520 H R E = 8 18 05 = 81805 E - - = 5 00 00 = 50000

• The sum of last column numbers is 333646, that double is 667292.

• adding 667292 to the sum of its digits 32 we get 667324.

• 6 × 6 × 7 × 3 × 3 × 4 = 6048.

• 6048 = 3 × 2016

• Finally, 3 + 2016 = 2019.



But there is more! Consider:

H A L = 8 + 1 + 12 = 21 F L I = 6 + 12 + 9 = 27 F E 3 = 6 + 5 + 3 = 14

• The product of the numbers in the last column is 21 × 27 × 14 = 7938, and

• the 7938-th prime number is 81083

• Adding 81083 to its reverse 38018 we get 119101

• Finally, 119 × 101 = 12019, so HL3 is expected for 1st quarter 2019.

