Dear SeqFans,
Diophantine 4+5x^3=y^2 has 4 solutions (x,y >= 0):
x=0,1,4,532 and y=2,3,18,27438.
Are there more solutions (x>2*10^9)?
thx, zak
(17:59) gp > {for(x=0,2*10^9,if(issquare(4+5* x^3,&y),print(x","y)))}
0,2
1,3
4,18
532,27438
(18:46) gp >