Mi a baj a programommal?

Meg kell mondania egy számról hogy prím vagy nem. Tudom hogy nem az összes prím van benne de mindegy mert, egyszer vizsgálatot nyomok és:

[link]

Másodszorra már nem is engedi megvizsgálni a számot. Hol a hiba? A program kódja:

long primek[]={2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,

79,83,89,97,101,103,107,109,113,127,131,137,139,149,151,157,163,167,173,

179,181,191,193,197,199,211,223,227,229,233,239,241,251,257,263,269,271,

277,281,283,293,307,311,313,317,331,337,347,349,353,359,367,373,379,383,

389,397,401,409,419,421,431,433,439,443,449,457,461,463,467,479,487,491,

499,503,509,521,523,541,547,557,563,569,571,577,587,593,599,601,607,613,

617,619,631,641,643,647,653,659,661,673,677,683,691,701,709,719,727,733,

739,743,751,757,761,769,773,787,797,809,811,821,823,827,829,839,853,857,

859,863,877,881,883,887,907,911,919,929,937,941,947,953,967,971,977,983,

991,997,1009,1013,1019,1021,1031,1033,1039,1049,1051,1061,1063,1069,1087,

1091,1093,1097,1103,1109,1117,1123,1129,1151,1153,1163,1171,1181,1187,1193,

1201,1213,1217,1223,1229,1231,1237,1249,1259,1277,1279,1283,1289,1291,1297,

1301,1303,1307,1319,1321,1327,1361,1367,1373,1381,1399,1409,1423,1427,1429,

1433,1439,1447,1451,1453,1459,1471,1481,1483,1487,1489,1493,1499,1511,1523,

1531,1543,1549,1553,1559,1567,1571,1579,1583,1597,1601,1607,1609,1613,1619,

1621,1627,1637,1657,1663,1667,1669,1693,1697,1699,1709,1721,1723,1733,1741,

1747,1753,1759,1777,1783,1787,1789,1801,1811,1823,1831,1847,1861,1867,1871,

1873,1877,1879,1889,1901,1907,1913,1931,1933,1949,1951,1973,1979,1987,1993,

1997,1999,2003,2011,2017,2027,2029,2039,2053,2063,2069,2081,2083,2087,2089,

2099,2111,2113,2129,2131,2137,2141,2143,2153,2161,2179,2203,2207,2213,2221,

2237,2239,2243,2251,2267,2269,2273,2281,2287,2293,2297,2309,2311,2333,2339,

2341,2347,2351,2357,2371,2377,2381,2383,2389,2393,2399,2411,2417,2423,2437,

2441,2447,2459,2467,2473,2477,2503,2521,2531,2539,2543,2549,2551,2557,2579,

2591,2593,2609,2617,2621,2633,2647,2657,2659,2663,2671,2677,2683,2687,2689,

2693,2699,2707,2711,2713,2719,2729,2731,2741,2749,2753,2767,2777,2789,2791,

2797,2801,2803,2819,2833,2837,2843,2851,2857,2861,2879,2887,2897,2903,2909,

2917,2927,2939,2953,2957,2963,2969,2971,2999,3001,3011,3019,3023,3037,3041,

3049,3061,3067,3079,3083,3089,3109,3119,3121,3137,3163,3167,3169,3181,3187,

3191,3203,3209,3217,3221,3229,3251,3253,3257,3259,3271,3299,3301,3307,3313,

3319,3323,3329,3331,3343,3347,3359,3361,3371,3373,3389,3391,3407,3413,3433,

3449,3457,3461,3463,3467,3469,3491,3499,3511,3517,3527,3529,3533,3539,3541,

3547,3557,3559,3571};

String beszam;

float beszamfloat;

int cv=0, i=500;

beszam=textField1.getText();

beszamfloat=Float.parseFloat(beszam);

if (beszamfloat<0)

{

textField1.setText("Pozitív számot adjon meg!");

}

for (cv=0;cv<i;cv++)

if (beszamfloat==primek[cv])

{

textField2.setText("A megadott szám prímszám.");

}

if (beszamfloat!=primek[cv])

{

textField2.setText("A megadott szám nem prímszám.");

}