Calculate the far distance when the decimal is multiplied by 1.05
1811511 * 1.05 = 1902086.55 (depends on your settings).
1902086.55 results are rounded to 1902087
so the search is 1811511 to 1902087
How do you determine the exact range to multiply by 1.05 in a puzzle that does not have a solved private key?
it's simple, if you do multipler with large value, it's gonna be exceed, 1.01 - 1.05 it's quietly large.