(3 x 51)
153 is the sum of all the integers from 1 to 17 (which is prime).
Jhn 21:11 Simon Peter went up, and drew the net to land full of great fishes,
an hundred and fifty and three:
and for all there were so many, yet was not the net broken.
His disciples caught 153 fish
153 fishes (3 x 51) the disciples caught in John 21.
Peter had denied Jesus three times.
Elijah sits on a mountaintop (2Kings 1.8)
and is summoned by the king to come down
delivered by a captain of fifty and his fifty (51).
'Man of God' says the captain, 'my king summons you to come down.'
Elijah says Indeed, if I am a man of God,
let fire come down and destroy you and your fifty: Fire killed all 51.
The king dispatched another captain and his fifty: Fire killed all 51.
And a third 51 arrive. The third captain and his 50 are spared.
(3*51) sent, one group (51) remained alive with Elijahs message.
Most likely the 51 for repentance comes from the Jubilee Year (50th).
Romans 6:6-8-9 Verse 9 "through whom we have now received the atonement" = 1989 (13x153)