The latest PARI/gp command-line and first few lines of ouput are copied below. Note that Keith Briggs has already published in Experimental Mathematics around 2006 on superabundant and colossally abundant numbers out to ~~~ 10^(10^10) or so, using a sieve technique to locate the first ~ 10^9 or 10^10 primes, and making use of the… Continue reading My insane pursuit of highly abundant numbers …