Igor Schein on Thu, 29 May 2003 14:23:48 -0400


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galoisinit() bug


Hi,

          GP/PARI CALCULATOR Version 2.2.6 (development CHANGES-1.754)
           i686 running linux (ix86/GMP-4.1.2 kernel) 32-bit version
       compiled: May 22 2003, gcc-3.2.2 20030222 (Red Hat Linux 3.2.2-5)
                (readline v4.3 enabled, extended help available)

? {p=
x^90 - 890*x^88 + 371833*x^86 - 96981469*x^84 + 17716772510*x^82 - 241116842
0638*x^80 + 253895560181305*x^78 - 21210908308362867*x^76 + 1430561483875447
846*x^74 - 78869650313368445363*x^72 + 3586827641653722294740*x^70 - 1354580
53167260958110682*x^68 + 4269036675024350888356145*x^66 - 112684140013222583
424270662*x^64 + 2497843095268802007533338595*x^62 - 46589509874789283139165
298353*x^60 + 732228624903260092945395491703*x^58 - 970660997457536208159576
2328943*x^56 + 108596288484435999051318498477243*x^54 - 10256477272520963961
51170188710037*x^52 + 8176478195529920027833124273318067*x^50 - 549913480706
99229537558417604821193*x^48 + 311721430426354983689000225368922679*x^46 - 1
487162184216983370720034812878620857*x^44 + 59596150589128834704958114766940
74027*x^42 - 20010224191899179937849151157061692599*x^40 + 56118215814932952
437805347032264053007*x^38 - 130958393721867539233633260643359511321*x^36 +
253151547946006837863940663623421726243*x^34 - 40319409614350722881833712507
8750457344*x^32 + 525718614826249818781229771766936932512*x^30 - 55687646003
2927179434097539049254636453*x^28 + 474774674265051724187602924170600258241*
x^26 - 322114361196147797185878183159582620536*x^24 + 1715129493663492528447
21108387402435331*x^22 - 70468258165813673164074247734023328388*x^20 + 21889
790426122548974522052349064388656*x^18 - 50195272385753644839855518943899850
49*x^16 + 827291805066738256645697515283504425*x^14 - 9526097701834897066942
9670815364828*x^12 + 7428381459140890025517569292362594*x^10 - 3759183654726
38348762078268717491*x^8 + 11479410097164770552438067031502*x^6 - 1823477335
75822666642604936385*x^4 + 1010685423371775900798585943*x^2 - 21629970383936
241994231
;}
? default(parisize,64m)
   parisize = 64000000
? galoisinit(p);
  ***   impossible inverse modulo: Mod(2, 30).

Thanks

Igor