Factor out the common term 111111 from the expression:
11×19×23+3×11=11(19×23+3) 11 \times 19 \times 23 + 3 \times 11 = 11(19 \times 23 + 3) 11×19×23+3×11=11(19×23+3)
Now simplify the expression inside the parentheses:
19×23=437 19 \times 23 = 437 19×23=437
437+3=440 437 + 3 = 440 437+3=440
Thus, the expression becomes:
11×440=4840 11 \times 440 = 4840 11×440=4840
Since 484048404840 is divisible by 111111, it is not a prime number.