jshell> BigInteger.ONE
$1 ==> 1

jshell> BigInteger.TEN
$2 ==> 10

jshell> BigInteger a = new BigInteger("8234593824998023598023598032589023598023590834890235");
a ==> 8234593824998023598023598032589023598023590834890235

jshell> BigInteger b = new BigInteger("9803259805248235890325980352980325980352890325980235890235890235890983250592380
jshell> BigInteger b = new BigInteger("9803259805248235890325980352980325980352890325980235890235890235890983250592380

jshell> BigInteger b = new BigInteger("9803259805248235890325980352980325980352890325980235890235890235890983250592380
jshell> BigInteger b = new BigInteger("9803259805248235890325980352980325980352890325980235890235890235890983250592380");
b ==> 9803259805248235890325980352980325980352890325980235890235890235890983250592380

jshell> a
a ==> 8234593824998023598023598032589023598023590834890235

jshell> b
b ==> 9803259805248235890325980352980325980352890325980235890235890235890983250592380

jshell> a*b
|  Error:
|  bad operand types for binary operator '*'
|    first type:  java.math.BigInteger
|    second type: java.math.BigInteger
|  a*b
|  ^-^

jshell> a.multiply(b)
$7 ==> 80725862657148450672567420472175913617410214222516097943285057735255828256989883771485443777236171097359092071093154712336027409300

jshell> a.add(b)
$8 ==> 9803259805248235890325980361214919805350913924003833922824913833914574085482615

jshell> a.divide(b)
$9 ==> 0

jshell> a.gcd(b)
$10 ==> 45

jshell> BigInteger bust = new BigInteger(42);
|  Error:
|  BigInteger(long) has private access in java.math.BigInteger
|  BigInteger bust = new BigInteger(42);
|                    ^----------------^

jshell> BigInteger bust = BigInteger.valueOf(42);
bust ==> 42

jshell> bust
bust ==> 42

jshell> bust.pow(200)
$13 ==> 4465376470175488819583354332837479881996088252645562774335559567825748798543416842675126232847768910589361958464270125522765164954545965420614182507056590733983770160518719452011792956238552577129118989946103418485965855406443705248609754712833369621198417226775605130616769349401274892440587696041471377975358783976820965376

jshell> bust.sqrt()
$14 ==> 6

jshell> BigInteger.valueOf(100).sqrt()
$15 ==> 10

jshell> 
(base) MAC:Thu Oct 14:13:14:~>