bnfinit milestone: degree 100 reached!

[Bill Allombert <Bill.Allombert@math.u-bordeaux1.fr>]

Dear PARI developers,

I finally managed to compute the bnfinit of a degree-100 polynomial:
polresultant(('a*x)^25-('a*x)-1,polcyclo(5,'a),'a)
a.k.a.
x^100+x^76-4*x^75+x^52-3*x^51+6*x^50+x^28-2*x^27+3*x^26-4*x^25+x^4-x^3+x^2-x+1
which is named a4/25 in my collezione.

The class number is 1 and the regulator is 2.421833172133607307460472752 e56

The successful run took 5 days and 18 hours.
I had to double LIMC (Bach constant: 0.3011379739144176005)
I used an patch that automatically increase BMULT, maxtry_DEP and maxtry_FACT
when we have exhausted the list of ideals. The starting values were
8/20/1000 and the final value were 12/60/1500.

This is dedicated to Loïc Grenié, of course. Enjoy!

Cheers,
Bill.