“And the things that thou hast heard of me among many witnesses, the same commit thou to faithful men, who shall be able to teach others also.” (2 Tim.2:2)

If one Disciple mentors one disciple each year.
1 – 2 – 4 – 8 – 16 – 32 – 64 – 128 – 256 – 512 – 1,024 – 2,048 – 4,096 – 8,192 (14 yrs.)
Beans as shown or Disciples
16,384 – 32,768 – 65,536 – 131,072 – 262,144 – 524,288 – 1,048,576 (21 yrs.)
2,097,152 – 4,194,304 – 8,388,608 – 16,777,216 – 33,554,432 – 67,108,864 (27 yrs.)
134,217,728 – 328,435,456 – 536,870,912 – 1,073,741,824 – 2,147,483,648 (32 yrs.)
4,294,967,296 – 8,589,934,592 (34 yrs.)
(Our Lord gained 120 disciples in just 3 years.)