Is the sum of 15625**2+1024 prime or composite?
15625**2+1024的和是质数还是合数？
<gadget id="calculator">15_625 ** 2</gadget>
<output>244_140_625</output>

<gadget id="calculator">244_140_625 + 1_024</gadget>
<output>244_141_649</output>

<result>244_141_649</result>